CVE-2026-8932 (GCVE-0-2026-8932)
Vulnerability from cvelistv5
Published
2026-07-03 06:16
Modified
2026-09-15 06:03
CWE
  • CWE-305 - Authentication Bypass by Primary Weakness
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.
Impacted products
Vendor Product Version
curl curl Version: 7.7.0   ≤
Version: 8.15.0   ≤
Version: 8.17.0   ≤
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   curl curl Version: a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4
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   curl curl Version: 8.20.0
Version: 8.19.0
Version: 8.18.0
Version: 8.17.0
Version: 8.16.0
Version: 8.15.0
Version: 8.14.1
Version: 8.14.0
Version: 8.13.0
Version: 8.12.1
Version: 8.12.0
Version: 8.11.1
Version: 8.11.0
Version: 8.10.1
Version: 8.10.0
Version: 8.9.1
Version: 8.9.0
Version: 8.8.0
Version: 8.7.1
Version: 8.7.0
Version: 8.6.0
Version: 8.5.0
Version: 8.4.0
Version: 8.3.0
Version: 8.2.1
Version: 8.2.0
Version: 8.1.2
Version: 8.1.1
Version: 8.1.0
Version: 8.0.1
Version: 8.0.0
Version: 7.88.1
Version: 7.88.0
Version: 7.87.0
Version: 7.86.0
Version: 7.85.0
Version: 7.84.0
Version: 7.83.1
Version: 7.83.0
Version: 7.82.0
Version: 7.81.0
Version: 7.80.0
Version: 7.79.1
Version: 7.79.0
Version: 7.78.0
Version: 7.77.0
Version: 7.76.1
Version: 7.76.0
Version: 7.75.0
Version: 7.74.0
Version: 7.73.0
Version: 7.72.0
Version: 7.71.1
Version: 7.71.0
Version: 7.70.0
Version: 7.69.1
Version: 7.69.0
Version: 7.68.0
Version: 7.67.0
Version: 7.66.0
Version: 7.65.3
Version: 7.65.2
Version: 7.65.1
Version: 7.65.0
Version: 7.64.1
Version: 7.64.0
Version: 7.63.0
Version: 7.62.0
Version: 7.61.1
Version: 7.61.0
Version: 7.60.0
Version: 7.59.0
Version: 7.58.0
Version: 7.57.0
Version: 7.56.1
Version: 7.56.0
Version: 7.55.1
Version: 7.55.0
Version: 7.54.1
Version: 7.54.0
Version: 7.53.1
Version: 7.53.0
Version: 7.52.1
Version: 7.52.0
Version: 7.51.0
Version: 7.50.3
Version: 7.50.2
Version: 7.50.1
Version: 7.50.0
Version: 7.49.1
Version: 7.49.0
Version: 7.48.0
Version: 7.47.1
Version: 7.47.0
Version: 7.46.0
Version: 7.45.0
Version: 7.44.0
Version: 7.43.0
Version: 7.42.1
Version: 7.42.0
Version: 7.41.0
Version: 7.40.0
Version: 7.39.0
Version: 7.38.0
Version: 7.37.1
Version: 7.37.0
Version: 7.36.0
Version: 7.35.0
Version: 7.34.0
Version: 7.33.0
Version: 7.32.0
Version: 7.31.0
Version: 7.30.0
Version: 7.29.0
Version: 7.28.1
Version: 7.28.0
Version: 7.27.0
Version: 7.26.0
Version: 7.25.0
Version: 7.24.0
Version: 7.23.1
Version: 7.23.0
Version: 7.22.0
Version: 7.21.7
Version: 7.21.6
Version: 7.21.5
Version: 7.21.4
Version: 7.21.3
Version: 7.21.2
Version: 7.21.1
Version: 7.21.0
Version: 7.20.1
Version: 7.20.0
Version: 7.19.7
Version: 7.19.6
Version: 7.19.5
Version: 7.19.4
Version: 7.19.3
Version: 7.19.2
Version: 7.19.1
Version: 7.19.0
Version: 7.18.2
Version: 7.18.1
Version: 7.18.0
Version: 7.17.1
Version: 7.17.0
Version: 7.16.4
Version: 7.16.3
Version: 7.16.2
Version: 7.16.1
Version: 7.16.0
Version: 7.15.5
Version: 7.15.4
Version: 7.15.3
Version: 7.15.2
Version: 7.15.1
Version: 7.15.0
Version: 7.14.1
Version: 7.14.0
Version: 7.13.2
Version: 7.13.1
Version: 7.13.0
Version: 7.12.3
Version: 7.12.2
Version: 7.12.1
Version: 7.12.0
Version: 7.11.2
Version: 7.11.1
Version: 7.11.0
Version: 7.10.8
Version: 7.10.7
Version: 7.10.6
Version: 7.10.5
Version: 7.10.4
Version: 7.10.3
Version: 7.10.2
Version: 7.10.1
Version: 7.10
Version: 7.9.8
Version: 7.9.7
Version: 7.9.6
Version: 7.9.5
Version: 7.9.4
Version: 7.9.3
Version: 7.9.2
Version: 7.9.1
Version: 7.9
Version: 7.8.1
Version: 7.8
Version: 7.7.3
Version: 7.7.2
Version: 7.7.1
Version: 7.7
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Show details on NVD website


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\"version\": \"7.37.0\"}, {\"status\": \"affected\", \"version\": \"7.36.0\"}, {\"status\": \"affected\", \"version\": \"7.35.0\"}, {\"status\": \"affected\", \"version\": \"7.34.0\"}, {\"status\": \"affected\", \"version\": \"7.33.0\"}, {\"status\": \"affected\", \"version\": \"7.32.0\"}, {\"status\": \"affected\", \"version\": \"7.31.0\"}, {\"status\": \"affected\", \"version\": \"7.30.0\"}, {\"status\": \"affected\", \"version\": \"7.29.0\"}, {\"status\": \"affected\", \"version\": \"7.28.1\"}, {\"status\": \"affected\", \"version\": \"7.28.0\"}, {\"status\": \"affected\", \"version\": \"7.27.0\"}, {\"status\": \"affected\", \"version\": \"7.26.0\"}, {\"status\": \"affected\", \"version\": \"7.25.0\"}, {\"status\": \"affected\", \"version\": \"7.24.0\"}, {\"status\": \"affected\", \"version\": \"7.23.1\"}, {\"status\": \"affected\", \"version\": \"7.23.0\"}, {\"status\": \"affected\", \"version\": \"7.22.0\"}, {\"status\": \"affected\", \"version\": \"7.21.7\"}, {\"status\": 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{\"status\": \"affected\", \"version\": \"7.18.0\"}, {\"status\": \"affected\", \"version\": \"7.17.1\"}, {\"status\": \"affected\", \"version\": \"7.17.0\"}, {\"status\": \"affected\", \"version\": \"7.16.4\"}, {\"status\": \"affected\", \"version\": \"7.16.3\"}, {\"status\": \"affected\", \"version\": \"7.16.2\"}, {\"status\": \"affected\", \"version\": \"7.16.1\"}, {\"status\": \"affected\", \"version\": \"7.16.0\"}, {\"status\": \"affected\", \"version\": \"7.15.5\"}, {\"status\": \"affected\", \"version\": \"7.15.4\"}, {\"status\": \"affected\", \"version\": \"7.15.3\"}, {\"status\": \"affected\", \"version\": \"7.15.2\"}, {\"status\": \"affected\", \"version\": \"7.15.1\"}, {\"status\": \"affected\", \"version\": \"7.15.0\"}, {\"status\": \"affected\", \"version\": \"7.14.1\"}, {\"status\": \"affected\", \"version\": \"7.14.0\"}, {\"status\": \"affected\", \"version\": \"7.13.2\"}, {\"status\": \"affected\", \"version\": \"7.13.1\"}, {\"status\": \"affected\", \"version\": \"7.13.0\"}, {\"status\": \"affected\", \"version\": \"7.12.3\"}, {\"status\": \"affected\", \"version\": \"7.12.2\"}, {\"status\": \"affected\", \"version\": \"7.12.1\"}, {\"status\": \"affected\", \"version\": \"7.12.0\"}, {\"status\": \"affected\", \"version\": \"7.11.2\"}, {\"status\": \"affected\", \"version\": \"7.11.1\"}, {\"status\": \"affected\", \"version\": \"7.11.0\"}, {\"status\": \"affected\", \"version\": \"7.10.8\"}, {\"status\": \"affected\", \"version\": \"7.10.7\"}, {\"status\": \"affected\", \"version\": \"7.10.6\"}, {\"status\": \"affected\", \"version\": \"7.10.5\"}, {\"status\": \"affected\", \"version\": \"7.10.4\"}, {\"status\": \"affected\", \"version\": \"7.10.3\"}, {\"status\": \"affected\", \"version\": \"7.10.2\"}, {\"status\": \"affected\", \"version\": \"7.10.1\"}, {\"status\": \"affected\", \"version\": \"7.10\"}, {\"status\": \"affected\", \"version\": \"7.9.8\"}, {\"status\": \"affected\", \"version\": \"7.9.7\"}, {\"status\": \"affected\", \"version\": \"7.9.6\"}, {\"status\": \"affected\", \"version\": \"7.9.5\"}, {\"status\": \"affected\", \"version\": \"7.9.4\"}, {\"status\": \"affected\", \"version\": \"7.9.3\"}, {\"status\": \"affected\", \"version\": \"7.9.2\"}, {\"status\": \"affected\", \"version\": \"7.9.1\"}, {\"status\": \"affected\", \"version\": \"7.9\"}, {\"status\": \"affected\", \"version\": \"7.8.1\"}, {\"status\": \"affected\", \"version\": \"7.8\"}, {\"status\": \"affected\", \"version\": \"7.7.3\"}, {\"status\": \"affected\", \"version\": \"7.7.2\"}, {\"status\": \"affected\", \"version\": \"7.7.1\"}, {\"status\": \"affected\", \"version\": \"7.7\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://curl.se/docs/CVE-2026-8932.json\"}, {\"url\": \"https://curl.se/docs/CVE-2026-8932.html\"}, {\"url\": \"https://hackerone.com/reports/3733910\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"libcurl would reuse a previously created connection even when some mTLS config\\nrelated option had been changed that should have prohibited reuse.\\n\\nlibcurl keeps previously used connections in a connection pool for subsequent\\ntransfers to reuse if one of them matches the setup. However, some TLS\\nsettings related to client certificates were left out from the configuration\\nmatch checks, making them match too easily. In particular options related to\\nthe private key.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-305\", \"description\": \"Authentication Bypass by Primary Weakness\"}]}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2026-09-15T06:03:27.324Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-8932\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-15T06:03:27.324Z\", \"dateReserved\": \"2026-05-19T08:56:58.825Z\", \"assignerOrgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"datePublished\": \"2026-07-03T06:16:30.485Z\", \"assignerShortName\": \"curl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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