Vulnerability-Lookup

FKIE_CVE-2026-82209

Vulnerability from fkie_nvd - Published: 2026-09-06 18:17 - Updated: 2026-09-11 20:01

Severity

8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Summary

When libpsl support is enabled, libcurl fails to enforce the Public Suffix List boundary check when processing a `Set-Cookie` header where the `Domain` attribute explicitly matches an origin host that is itself a public suffix (e.g., `Domain=co.uk` set by `co.uk`). Instead of coercing it into a strict host-only cookie, libcurl saves the cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is inappropriately included in subsequent outbound requests or HTTP redirects to arbitrary sibling subdomains under the same public suffix (e.g., `attacker.co.uk`).

References

URL	Tags
2499f714-1537-4658-8207-48ae4bb9eae9	https://curl.se/docs/CVE-2026-82209.html	Patch, Vendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9	https://curl.se/docs/CVE-2026-82209.json	Vendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9	https://hackerone.com/reports/3972385	Exploit, Mitigation, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://hackerone.com/reports/3972385	Exploit, Mitigation, Third Party Advisory

Impacted products

	Vendor	Product	Version
	haxx	curl	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.21.0",
              "status": "affected",
              "version": "8.21.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.20.0",
              "status": "affected",
              "version": "8.20.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.0",
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.18.0",
              "status": "affected",
              "version": "8.18.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.17.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.16.0",
              "status": "affected",
              "version": "8.16.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.15.0",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.1",
              "status": "affected",
              "version": "8.14.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.0",
              "status": "affected",
              "version": "8.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.13.0",
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.1",
              "status": "affected",
              "version": "8.12.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.0",
              "status": "affected",
              "version": "8.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.1",
              "status": "affected",
              "version": "8.11.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.0",
              "status": "affected",
              "version": "8.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.1",
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.0",
              "status": "affected",
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              "lessThanOrEqual": "8.7.1",
              "status": "affected",
              "version": "8.7.1",
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            {
              "lessThanOrEqual": "8.7.0",
              "status": "affected",
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            {
              "lessThanOrEqual": "8.6.0",
              "status": "affected",
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            {
              "lessThanOrEqual": "8.5.0",
              "status": "affected",
              "version": "8.5.0",
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            {
              "lessThanOrEqual": "8.4.0",
              "status": "affected",
              "version": "8.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.3.0",
              "status": "affected",
              "version": "8.3.0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "8.2.1",
              "status": "affected",
              "version": "8.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.0",
              "status": "affected",
              "version": "8.2.0",
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            {
              "lessThanOrEqual": "8.1.2",
              "status": "affected",
              "version": "8.1.2",
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            {
              "lessThanOrEqual": "8.1.1",
              "status": "affected",
              "version": "8.1.1",
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            {
              "lessThanOrEqual": "8.1.0",
              "status": "affected",
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            },
            {
              "lessThanOrEqual": "8.0.1",
              "status": "affected",
              "version": "8.0.1",
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            },
            {
              "lessThanOrEqual": "8.0.0",
              "status": "affected",
              "version": "8.0.0",
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            },
            {
              "lessThanOrEqual": "7.88.1",
              "status": "affected",
              "version": "7.88.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.0",
              "status": "affected",
              "version": "7.88.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.87.0",
              "status": "affected",
              "version": "7.87.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.86.0",
              "status": "affected",
              "version": "7.86.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.85.0",
              "status": "affected",
              "version": "7.85.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.84.0",
              "status": "affected",
              "version": "7.84.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.1",
              "status": "affected",
              "version": "7.83.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.0",
              "status": "affected",
              "version": "7.83.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.82.0",
              "status": "affected",
              "version": "7.82.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.81.0",
              "status": "affected",
              "version": "7.81.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.80.0",
              "status": "affected",
              "version": "7.80.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.1",
              "status": "affected",
              "version": "7.79.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.0",
              "status": "affected",
              "version": "7.79.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.78.0",
              "status": "affected",
              "version": "7.78.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.77.0",
              "status": "affected",
              "version": "7.77.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.1",
              "status": "affected",
              "version": "7.76.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.0",
              "status": "affected",
              "version": "7.76.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.75.0",
              "status": "affected",
              "version": "7.75.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.74.0",
              "status": "affected",
              "version": "7.74.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.73.0",
              "status": "affected",
              "version": "7.73.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.72.0",
              "status": "affected",
              "version": "7.72.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.71.1",
              "status": "affected",
              "version": "7.71.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.71.0",
              "status": "affected",
              "version": "7.71.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.70.0",
              "status": "affected",
              "version": "7.70.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.69.1",
              "status": "affected",
              "version": "7.69.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.69.0",
              "status": "affected",
              "version": "7.69.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.68.0",
              "status": "affected",
              "version": "7.68.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.67.0",
              "status": "affected",
              "version": "7.67.0",
              "versionType": "semver"
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            {
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              "status": "affected",
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            {
              "lessThanOrEqual": "7.65.3",
              "status": "affected",
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            {
              "lessThanOrEqual": "7.65.2",
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            {
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            {
              "lessThanOrEqual": "7.65.0",
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            {
              "lessThanOrEqual": "7.64.1",
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            {
              "lessThanOrEqual": "7.64.0",
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              "status": "affected",
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              "lessThanOrEqual": "7.62.0",
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              "lessThanOrEqual": "7.61.0",
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              "status": "affected",
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            {
              "lessThanOrEqual": "7.58.0",
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            {
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            {
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              "status": "affected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "7.56.0",
              "status": "affected",
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            {
              "lessThanOrEqual": "7.55.1",
              "status": "affected",
              "version": "7.55.1",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "7.55.0",
              "status": "affected",
              "version": "7.55.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.54.1",
              "status": "affected",
              "version": "7.54.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.54.0",
              "status": "affected",
              "version": "7.54.0",
              "versionType": "semver"
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            {
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              "status": "affected",
              "version": "7.53.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.53.0",
              "status": "affected",
              "version": "7.53.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.52.1",
              "status": "affected",
              "version": "7.52.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.52.0",
              "status": "affected",
              "version": "7.52.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.51.0",
              "status": "affected",
              "version": "7.51.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.3",
              "status": "affected",
              "version": "7.50.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.2",
              "status": "affected",
              "version": "7.50.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.1",
              "status": "affected",
              "version": "7.50.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.0",
              "status": "affected",
              "version": "7.50.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.49.1",
              "status": "affected",
              "version": "7.49.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.49.0",
              "status": "affected",
              "version": "7.49.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.48.0",
              "status": "affected",
              "version": "7.48.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.47.1",
              "status": "affected",
              "version": "7.47.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.47.0",
              "status": "affected",
              "version": "7.47.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.46.0",
              "status": "affected",
              "version": "7.46.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "90DD0BCD-CC3E-479C-9720-399378C87E00",
              "versionEndExcluding": "8.22.0",
              "versionStartIncluding": "7.46.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When libpsl support is enabled, libcurl fails to enforce the Public Suffix\nList boundary check when processing a `Set-Cookie` header where the `Domain`\nattribute explicitly matches an origin host that is itself a public suffix\n(e.g., `Domain=co.uk` set by `co.uk`).\n\nInstead of coercing it into a strict host-only cookie, libcurl saves the\ncookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is\ninappropriately included in subsequent outbound requests or HTTP redirects to\narbitrary sibling subdomains under the same public suffix (e.g.,\n`attacker.co.uk`)."
    }
  ],
  "id": "CVE-2026-82209",
  "lastModified": "2026-09-11T20:01:57.943",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82209",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-08T18:47:09.259604Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-06T18:17:22.847",
  "references": [
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://curl.se/docs/CVE-2026-82209.html"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://curl.se/docs/CVE-2026-82209.json"
    },
    {
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "tags": [
        "Exploit",
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/3972385"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://hackerone.com/reports/3972385"
    }
  ],
  "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-201"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2026-82209 (GCVE-0-2026-82209)

Vulnerability from cvelistv5 – Published: 2026-09-06 17:49 – Updated: 2026-09-08 18:48

Title

domain-scoped PSL domain cookie

Summary

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:47 UTC

CWE

CWE-201 Information Exposure Through Sent Data
CWE-201 - Insertion of Sensitive Information Into Sent Data

Assigner

curl redhat root

References

3 references

URL	Tags
https://curl.se/docs/CVE-2026-82209.json
https://curl.se/docs/CVE-2026-82209.html
https://hackerone.com/reports/3972385

Impacted products

1 product

Vendor	Product	Version
curl	curl	Affected: 8.21.0 , ≤ 8.21.0 (semver) Affected: 8.20.0 , ≤ 8.20.0 (semver) Affected: 8.19.0 , ≤ 8.19.0 (semver) Affected: 8.18.0 , ≤ 8.18.0 (semver) Affected: 8.17.0 , ≤ 8.17.0 (semver) Affected: 8.16.0 , ≤ 8.16.0 (semver) Affected: 8.15.0 , ≤ 8.15.0 (semver) Affected: 8.14.1 , ≤ 8.14.1 (semver) Affected: 8.14.0 , ≤ 8.14.0 (semver) Affected: 8.13.0 , ≤ 8.13.0 (semver) Affected: 8.12.1 , ≤ 8.12.1 (semver) Affected: 8.12.0 , ≤ 8.12.0 (semver) Affected: 8.11.1 , ≤ 8.11.1 (semver) Affected: 8.11.0 , ≤ 8.11.0 (semver) Affected: 8.10.1 , ≤ 8.10.1 (semver) Affected: 8.10.0 , ≤ 8.10.0 (semver) Affected: 8.9.1 , ≤ 8.9.1 (semver) Affected: 8.9.0 , ≤ 8.9.0 (semver) Affected: 8.8.0 , ≤ 8.8.0 (semver) Affected: 8.7.1 , ≤ 8.7.1 (semver) Affected: 8.7.0 , ≤ 8.7.0 (semver) Affected: 8.6.0 , ≤ 8.6.0 (semver) Affected: 8.5.0 , ≤ 8.5.0 (semver) Affected: 8.4.0 , ≤ 8.4.0 (semver) Affected: 8.3.0 , ≤ 8.3.0 (semver) Affected: 8.2.1 , ≤ 8.2.1 (semver) Affected: 8.2.0 , ≤ 8.2.0 (semver) Affected: 8.1.2 , ≤ 8.1.2 (semver) Affected: 8.1.1 , ≤ 8.1.1 (semver) Affected: 8.1.0 , ≤ 8.1.0 (semver) Affected: 8.0.1 , ≤ 8.0.1 (semver) Affected: 8.0.0 , ≤ 8.0.0 (semver) Affected: 7.88.1 , ≤ 7.88.1 (semver) Affected: 7.88.0 , ≤ 7.88.0 (semver) Affected: 7.87.0 , ≤ 7.87.0 (semver) Affected: 7.86.0 , ≤ 7.86.0 (semver) Affected: 7.85.0 , ≤ 7.85.0 (semver) Affected: 7.84.0 , ≤ 7.84.0 (semver) Affected: 7.83.1 , ≤ 7.83.1 (semver) Affected: 7.83.0 , ≤ 7.83.0 (semver) Affected: 7.82.0 , ≤ 7.82.0 (semver) Affected: 7.81.0 , ≤ 7.81.0 (semver) Affected: 7.80.0 , ≤ 7.80.0 (semver) Affected: 7.79.1 , ≤ 7.79.1 (semver) Affected: 7.79.0 , ≤ 7.79.0 (semver) Affected: 7.78.0 , ≤ 7.78.0 (semver) Affected: 7.77.0 , ≤ 7.77.0 (semver) Affected: 7.76.1 , ≤ 7.76.1 (semver) Affected: 7.76.0 , ≤ 7.76.0 (semver) Affected: 7.75.0 , ≤ 7.75.0 (semver) Affected: 7.74.0 , ≤ 7.74.0 (semver) Affected: 7.73.0 , ≤ 7.73.0 (semver) Affected: 7.72.0 , ≤ 7.72.0 (semver) Affected: 7.71.1 , ≤ 7.71.1 (semver) Affected: 7.71.0 , ≤ 7.71.0 (semver) Affected: 7.70.0 , ≤ 7.70.0 (semver) Affected: 7.69.1 , ≤ 7.69.1 (semver) Affected: 7.69.0 , ≤ 7.69.0 (semver) Affected: 7.68.0 , ≤ 7.68.0 (semver) Affected: 7.67.0 , ≤ 7.67.0 (semver) Affected: 7.66.0 , ≤ 7.66.0 (semver) Affected: 7.65.3 , ≤ 7.65.3 (semver) Affected: 7.65.2 , ≤ 7.65.2 (semver) Affected: 7.65.1 , ≤ 7.65.1 (semver) Affected: 7.65.0 , ≤ 7.65.0 (semver) Affected: 7.64.1 , ≤ 7.64.1 (semver) Affected: 7.64.0 , ≤ 7.64.0 (semver) Affected: 7.63.0 , ≤ 7.63.0 (semver) Affected: 7.62.0 , ≤ 7.62.0 (semver) Affected: 7.61.1 , ≤ 7.61.1 (semver) Affected: 7.61.0 , ≤ 7.61.0 (semver) Affected: 7.60.0 , ≤ 7.60.0 (semver) Affected: 7.59.0 , ≤ 7.59.0 (semver) Affected: 7.58.0 , ≤ 7.58.0 (semver) Affected: 7.57.0 , ≤ 7.57.0 (semver) Affected: 7.56.1 , ≤ 7.56.1 (semver) Affected: 7.56.0 , ≤ 7.56.0 (semver) Affected: 7.55.1 , ≤ 7.55.1 (semver) Affected: 7.55.0 , ≤ 7.55.0 (semver) Affected: 7.54.1 , ≤ 7.54.1 (semver) Affected: 7.54.0 , ≤ 7.54.0 (semver) Affected: 7.53.1 , ≤ 7.53.1 (semver) Affected: 7.53.0 , ≤ 7.53.0 (semver) Affected: 7.52.1 , ≤ 7.52.1 (semver) Affected: 7.52.0 , ≤ 7.52.0 (semver) Affected: 7.51.0 , ≤ 7.51.0 (semver) Affected: 7.50.3 , ≤ 7.50.3 (semver) Affected: 7.50.2 , ≤ 7.50.2 (semver) Affected: 7.50.1 , ≤ 7.50.1 (semver) Affected: 7.50.0 , ≤ 7.50.0 (semver) Affected: 7.49.1 , ≤ 7.49.1 (semver) Affected: 7.49.0 , ≤ 7.49.0 (semver) Affected: 7.48.0 , ≤ 7.48.0 (semver) Affected: 7.47.1 , ≤ 7.47.1 (semver) Affected: 7.47.0 , ≤ 7.47.0 (semver) Affected: 7.46.0 , ≤ 7.46.0 (semver)

Credits

Stanislav Fort (Aisle Research) Daniel Stenberg

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 8.2,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-82209",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T18:47:09.259604Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-201",
                "description": "CWE-201 Insertion of Sensitive Information Into Sent Data",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T18:48:32.841Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://hackerone.com/reports/3972385"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.21.0",
              "status": "affected",
              "version": "8.21.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.20.0",
              "status": "affected",
              "version": "8.20.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.0",
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.18.0",
              "status": "affected",
              "version": "8.18.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.17.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.16.0",
              "status": "affected",
              "version": "8.16.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.15.0",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.1",
              "status": "affected",
              "version": "8.14.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.0",
              "status": "affected",
              "version": "8.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.13.0",
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.1",
              "status": "affected",
              "version": "8.12.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.0",
              "status": "affected",
              "version": "8.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.1",
              "status": "affected",
              "version": "8.11.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.0",
              "status": "affected",
              "version": "8.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.1",
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.0",
              "status": "affected",
              "version": "8.10.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.1",
              "status": "affected",
              "version": "8.9.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.0",
              "status": "affected",
              "version": "8.9.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.8.0",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.1",
              "status": "affected",
              "version": "8.7.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.0",
              "status": "affected",
              "version": "8.7.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.6.0",
              "status": "affected",
              "version": "8.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.0",
              "status": "affected",
              "version": "8.5.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.4.0",
              "status": "affected",
              "version": "8.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.3.0",
              "status": "affected",
              "version": "8.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.1",
              "status": "affected",
              "version": "8.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.0",
              "status": "affected",
              "version": "8.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.2",
              "status": "affected",
              "version": "8.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.1",
              "status": "affected",
              "version": "8.1.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.0",
              "status": "affected",
              "version": "8.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.1",
              "status": "affected",
              "version": "8.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.0",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.1",
              "status": "affected",
              "version": "7.88.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.0",
              "status": "affected",
              "version": "7.88.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.87.0",
              "status": "affected",
              "version": "7.87.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.86.0",
              "status": "affected",
              "version": "7.86.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.85.0",
              "status": "affected",
              "version": "7.85.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.84.0",
              "status": "affected",
              "version": "7.84.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.1",
              "status": "affected",
              "version": "7.83.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.0",
              "status": "affected",
              "version": "7.83.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.82.0",
              "status": "affected",
              "version": "7.82.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.81.0",
              "status": "affected",
              "version": "7.81.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.80.0",
              "status": "affected",
              "version": "7.80.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.1",
              "status": "affected",
              "version": "7.79.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.0",
              "status": "affected",
              "version": "7.79.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.78.0",
              "status": "affected",
              "version": "7.78.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.77.0",
              "status": "affected",
              "version": "7.77.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.1",
              "status": "affected",
              "version": "7.76.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.0",
              "status": "affected",
              "version": "7.76.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.75.0",
              "status": "affected",
              "version": "7.75.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.74.0",
              "status": "affected",
              "version": "7.74.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.73.0",
              "status": "affected",
              "version": "7.73.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.72.0",
              "status": "affected",
              "version": "7.72.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.71.1",
              "status": "affected",
              "version": "7.71.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.71.0",
              "status": "affected",
              "version": "7.71.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.70.0",
              "status": "affected",
              "version": "7.70.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.69.1",
              "status": "affected",
              "version": "7.69.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.69.0",
              "status": "affected",
              "version": "7.69.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.68.0",
              "status": "affected",
              "version": "7.68.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.67.0",
              "status": "affected",
              "version": "7.67.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.66.0",
              "status": "affected",
              "version": "7.66.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.65.3",
              "status": "affected",
              "version": "7.65.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.65.2",
              "status": "affected",
              "version": "7.65.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.65.1",
              "status": "affected",
              "version": "7.65.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.65.0",
              "status": "affected",
              "version": "7.65.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.64.1",
              "status": "affected",
              "version": "7.64.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.64.0",
              "status": "affected",
              "version": "7.64.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.63.0",
              "status": "affected",
              "version": "7.63.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.62.0",
              "status": "affected",
              "version": "7.62.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.61.1",
              "status": "affected",
              "version": "7.61.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.61.0",
              "status": "affected",
              "version": "7.61.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.60.0",
              "status": "affected",
              "version": "7.60.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.59.0",
              "status": "affected",
              "version": "7.59.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.58.0",
              "status": "affected",
              "version": "7.58.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.57.0",
              "status": "affected",
              "version": "7.57.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.56.1",
              "status": "affected",
              "version": "7.56.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.56.0",
              "status": "affected",
              "version": "7.56.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.55.1",
              "status": "affected",
              "version": "7.55.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.55.0",
              "status": "affected",
              "version": "7.55.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.54.1",
              "status": "affected",
              "version": "7.54.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.54.0",
              "status": "affected",
              "version": "7.54.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.53.1",
              "status": "affected",
              "version": "7.53.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.53.0",
              "status": "affected",
              "version": "7.53.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.52.1",
              "status": "affected",
              "version": "7.52.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.52.0",
              "status": "affected",
              "version": "7.52.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.51.0",
              "status": "affected",
              "version": "7.51.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.3",
              "status": "affected",
              "version": "7.50.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.2",
              "status": "affected",
              "version": "7.50.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.1",
              "status": "affected",
              "version": "7.50.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.50.0",
              "status": "affected",
              "version": "7.50.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.49.1",
              "status": "affected",
              "version": "7.49.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.49.0",
              "status": "affected",
              "version": "7.49.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.48.0",
              "status": "affected",
              "version": "7.48.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.47.1",
              "status": "affected",
              "version": "7.47.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.47.0",
              "status": "affected",
              "version": "7.47.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.46.0",
              "status": "affected",
              "version": "7.46.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Stanislav Fort (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Daniel Stenberg"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When libpsl support is enabled, libcurl fails to enforce the Public Suffix\nList boundary check when processing a `Set-Cookie` header where the `Domain`\nattribute explicitly matches an origin host that is itself a public suffix\n(e.g., `Domain=co.uk` set by `co.uk`).\n\nInstead of coercing it into a strict host-only cookie, libcurl saves the\ncookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is\ninappropriately included in subsequent outbound requests or HTTP redirects to\narbitrary sibling subdomains under the same public suffix (e.g.,\n`attacker.co.uk`)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-201 Information Exposure Through Sent Data",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-06T17:49:35.050Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2026-82209.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2026-82209.html"
        },
        {
          "name": "issue",
          "url": "https://hackerone.com/reports/3972385"
        }
      ],
      "title": "domain-scoped PSL domain cookie"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2026-82209",
    "datePublished": "2026-09-06T17:49:35.050Z",
    "dateReserved": "2026-08-28T08:25:48.340Z",
    "dateUpdated": "2026-09-08T18:48:32.841Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-82209

CVE-2026-82209 (GCVE-0-2026-82209)

Tags

Sightings

Nomenclature