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CVE-2026-8932 (GCVE-0-2026-8932)

Vulnerability from cvelistv5 – Published: 2026-07-03 06:16 – Updated: 2026-09-15 06:03
VLAI
Title
incomplete mTLS config matching in conn reuse
Summary
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 16:58 UTC
CWE
  • CWE-305 - Authentication Bypass by Primary Weakness
Impacted products
Vendor Product Version CPE status
curl curl Affected: 7.7.0 , < 8.14.2 (semver)
Affected: 8.15.0 , < 8.16.1 (semver)
Affected: 8.17.0 , < 8.20.1 (semver)
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curl curl Affected: a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 , < 7541ae569d82fb308a5e2d94916027da4fa3ba3e (git)
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curl curl Affected: 8.20.0
Affected: 8.19.0
Affected: 8.18.0
Affected: 8.17.0
Affected: 8.16.0
Affected: 8.15.0
Affected: 8.14.1
Affected: 8.14.0
Affected: 8.13.0
Affected: 8.12.1
Affected: 8.12.0
Affected: 8.11.1
Affected: 8.11.0
Affected: 8.10.1
Affected: 8.10.0
Affected: 8.9.1
Affected: 8.9.0
Affected: 8.8.0
Affected: 8.7.1
Affected: 8.7.0
Affected: 8.6.0
Affected: 8.5.0
Affected: 8.4.0
Affected: 8.3.0
Affected: 8.2.1
Affected: 8.2.0
Affected: 8.1.2
Affected: 8.1.1
Affected: 8.1.0
Affected: 8.0.1
Affected: 8.0.0
Affected: 7.88.1
Affected: 7.88.0
Affected: 7.87.0
Affected: 7.86.0
Affected: 7.85.0
Affected: 7.84.0
Affected: 7.83.1
Affected: 7.83.0
Affected: 7.82.0
Affected: 7.81.0
Affected: 7.80.0
Affected: 7.79.1
Affected: 7.79.0
Affected: 7.78.0
Affected: 7.77.0
Affected: 7.76.1
Affected: 7.76.0
Affected: 7.75.0
Affected: 7.74.0
Affected: 7.73.0
Affected: 7.72.0
Affected: 7.71.1
Affected: 7.71.0
Affected: 7.70.0
Affected: 7.69.1
Affected: 7.69.0
Affected: 7.68.0
Affected: 7.67.0
Affected: 7.66.0
Affected: 7.65.3
Affected: 7.65.2
Affected: 7.65.1
Affected: 7.65.0
Affected: 7.64.1
Affected: 7.64.0
Affected: 7.63.0
Affected: 7.62.0
Affected: 7.61.1
Affected: 7.61.0
Affected: 7.60.0
Affected: 7.59.0
Affected: 7.58.0
Affected: 7.57.0
Affected: 7.56.1
Affected: 7.56.0
Affected: 7.55.1
Affected: 7.55.0
Affected: 7.54.1
Affected: 7.54.0
Affected: 7.53.1
Affected: 7.53.0
Affected: 7.52.1
Affected: 7.52.0
Affected: 7.51.0
Affected: 7.50.3
Affected: 7.50.2
Affected: 7.50.1
Affected: 7.50.0
Affected: 7.49.1
Affected: 7.49.0
Affected: 7.48.0
Affected: 7.47.1
Affected: 7.47.0
Affected: 7.46.0
Affected: 7.45.0
Affected: 7.44.0
Affected: 7.43.0
Affected: 7.42.1
Affected: 7.42.0
Affected: 7.41.0
Affected: 7.40.0
Affected: 7.39.0
Affected: 7.38.0
Affected: 7.37.1
Affected: 7.37.0
Affected: 7.36.0
Affected: 7.35.0
Affected: 7.34.0
Affected: 7.33.0
Affected: 7.32.0
Affected: 7.31.0
Affected: 7.30.0
Affected: 7.29.0
Affected: 7.28.1
Affected: 7.28.0
Affected: 7.27.0
Affected: 7.26.0
Affected: 7.25.0
Affected: 7.24.0
Affected: 7.23.1
Affected: 7.23.0
Affected: 7.22.0
Affected: 7.21.7
Affected: 7.21.6
Affected: 7.21.5
Affected: 7.21.4
Affected: 7.21.3
Affected: 7.21.2
Affected: 7.21.1
Affected: 7.21.0
Affected: 7.20.1
Affected: 7.20.0
Affected: 7.19.7
Affected: 7.19.6
Affected: 7.19.5
Affected: 7.19.4
Affected: 7.19.3
Affected: 7.19.2
Affected: 7.19.1
Affected: 7.19.0
Affected: 7.18.2
Affected: 7.18.1
Affected: 7.18.0
Affected: 7.17.1
Affected: 7.17.0
Affected: 7.16.4
Affected: 7.16.3
Affected: 7.16.2
Affected: 7.16.1
Affected: 7.16.0
Affected: 7.15.5
Affected: 7.15.4
Affected: 7.15.3
Affected: 7.15.2
Affected: 7.15.1
Affected: 7.15.0
Affected: 7.14.1
Affected: 7.14.0
Affected: 7.13.2
Affected: 7.13.1
Affected: 7.13.0
Affected: 7.12.3
Affected: 7.12.2
Affected: 7.12.1
Affected: 7.12.0
Affected: 7.11.2
Affected: 7.11.1
Affected: 7.11.0
Affected: 7.10.8
Affected: 7.10.7
Affected: 7.10.6
Affected: 7.10.5
Affected: 7.10.4
Affected: 7.10.3
Affected: 7.10.2
Affected: 7.10.1
Affected: 7.10
Affected: 7.9.8
Affected: 7.9.7
Affected: 7.9.6
Affected: 7.9.5
Affected: 7.9.4
Affected: 7.9.3
Affected: 7.9.2
Affected: 7.9.1
Affected: 7.9
Affected: 7.8.1
Affected: 7.8
Affected: 7.7.3
Affected: 7.7.2
Affected: 7.7.1
Affected: 7.7
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Show details on NVD website

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              "confidentialityImpact": "NONE",
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              "version": "7.83.0"
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              "status": "affected",
              "version": "7.82.0"
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              "status": "affected",
              "version": "7.81.0"
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              "status": "affected",
              "version": "7.80.0"
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              "status": "affected",
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            {
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            {
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            {
              "status": "affected",
              "version": "7.33.0"
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            {
              "status": "affected",
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            {
              "status": "affected",
              "version": "7.31.0"
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              "status": "affected",
              "version": "7.30.0"
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
              "version": "7.27.0"
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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            {
              "status": "affected",
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            {
              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "7.21.4"
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            {
              "status": "affected",
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            {
              "status": "affected",
              "version": "7.21.2"
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            {
              "status": "affected",
              "version": "7.21.1"
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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            "dateUpdated": "2026-09-15T06:03:27.324Z",
            "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
            "shortName": "curl"
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            },
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            },
            {
              "url": "https://hackerone.com/reports/3733910"
            }
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          "title": "incomplete mTLS config matching in conn reuse",
          "x_generator": {
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          "x_osv": {
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            "credits": [
              {
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                "type": "finder"
              },
              {
                "name": "Joshua Rogers (Aisle Research)",
                "type": "remediation developer"
              }
            ],
            "database_specific": {
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                "id": "CWE-305"
              },
              "URL": "https://curl.se/docs/CVE-2026-8932.json",
              "affects": "lib",
              "issue": "https://hackerone.com/reports/3733910",
              "last_affected": "8.20.0",
              "package": "curl",
              "severity": "Low",
              "www": "https://curl.se/docs/CVE-2026-8932.html"
            },
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            "id": "CURL-CVE-2026-8932",
            "modified": "2026-09-07T10:34:51.00Z",
            "published": "2026-06-24T08:00:00.00Z",
            "schema_version": "1.5.0",
            "summary": "incomplete mTLS config matching in conn reuse"
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        "assignerShortName": "curl",
        "cveId": "CVE-2026-8932",
        "datePublished": "2026-07-03T06:16:30.485Z",
        "dateReserved": "2026-05-19T08:56:58.825Z",
        "dateUpdated": "2026-09-15T06:03:27.324Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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