Vulnerability-Lookup

GHSA-9R76-QJ98-JFHC

Vulnerability from github – Published: 2026-01-08 12:30 – Updated: 2026-01-08 15:31

Details

When using CURLOPT_PINNEDPUBLICKEY option with libcurl or --pinnedpubkey with the curl tool,curl should check the public key of the server certificate to verify the peer.

This check was skipped in a certain condition that would then make curl allow the connection without performing the proper check, thus not noticing a possible impostor. To skip this check, the connection had to be done with QUIC with ngtcp2 built to use GnuTLS and the user had to explicitly disable the standard certificate verification.

Severity

5.9 (Medium)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2025-13034"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-08T10:15:45Z",
    "severity": "MODERATE"
  },
  "details": "When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`\nwith the curl tool,curl should check the public key of the server certificate\nto verify the peer.\n\nThis check was skipped in a certain condition that would then make curl allow\nthe connection without performing the proper check, thus not noticing a\npossible impostor. To skip this check, the connection had to be done with QUIC\nwith ngtcp2 built to use GnuTLS and the user had to explicitly disable the\nstandard certificate verification.",
  "id": "GHSA-9r76-qj98-jfhc",
  "modified": "2026-01-08T15:31:25Z",
  "published": "2026-01-08T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13034"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2025-13034.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2025-13034.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-13034 (GCVE-0-2025-13034)

Vulnerability from cvelistv5 – Published: 2026-01-08 10:00 – Updated: 2026-01-08 14:58

Title

No QUIC certificate pinning with GnuTLS

Summary

When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool,curl should check the public key of the server certificate to verify the peer. This check was skipped in a certain condition that would then make curl allow the connection without performing the proper check, thus not noticing a possible impostor. To skip this check, the connection had to be done with QUIC with ngtcp2 built to use GnuTLS and the user had to explicitly disable the standard certificate verification.

Severity

5.9 (Medium)


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

CWE

CWE-295 Improper Certificate Validation

Assigner

curl

References

2 references

URL	Tags
https://curl.se/docs/CVE-2025-13034.json
https://curl.se/docs/CVE-2025-13034.html

Impacted products

1 product

Vendor	Product	Version
curl	curl	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)

Credits

Stanislav Fort (Aisle Research) Daniel Stenberg

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-13034",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T14:56:11.206224Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-295",
                "description": "CWE-295 Improper Certificate Validation",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-08T14:58:20.565Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Stanislav Fort (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Daniel Stenberg"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`\nwith the curl tool,curl should check the public key of the server certificate\nto verify the peer.\n\nThis check was skipped in a certain condition that would then make curl allow\nthe connection without performing the proper check, thus not noticing a\npossible impostor. To skip this check, the connection had to be done with QUIC\nwith ngtcp2 built to use GnuTLS and the user had to explicitly disable the\nstandard certificate verification."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-295 Improper Certificate Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-08T10:00:25.773Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2025-13034.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2025-13034.html"
        }
      ],
      "title": "No QUIC certificate pinning with GnuTLS"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2025-13034",
    "datePublished": "2026-01-08T10:00:25.773Z",
    "dateReserved": "2025-11-11T16:52:22.121Z",
    "dateUpdated": "2026-01-08T14:58:20.565Z",
    "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.

Action not permitted

GHSA-9R76-QJ98-JFHC

CVE-2025-13034 (GCVE-0-2025-13034)

Tags

Sightings

Nomenclature