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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-8458

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 34.0%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-8458
  • Haxx » Curl » Version: 7.46.0
    cpe:2.3:a:haxx:curl:7.46.0
  • Haxx » Curl » Version: 7.47.0
    cpe:2.3:a:haxx:curl:7.47.0
  • Haxx » Curl » Version: 7.47.1
    cpe:2.3:a:haxx:curl:7.47.1
  • Haxx » Curl » Version: 7.48.0
    cpe:2.3:a:haxx:curl:7.48.0
  • Haxx » Curl » Version: 7.49.0
    cpe:2.3:a:haxx:curl:7.49.0
  • Haxx » Curl » Version: 7.49.1
    cpe:2.3:a:haxx:curl:7.49.1
  • Haxx » Curl » Version: 7.50.0
    cpe:2.3:a:haxx:curl:7.50.0
  • Haxx » Curl » Version: 7.50.1
    cpe:2.3:a:haxx:curl:7.50.1
  • Haxx » Curl » Version: 7.50.2
    cpe:2.3:a:haxx:curl:7.50.2
  • Haxx » Curl » Version: 7.50.3
    cpe:2.3:a:haxx:curl:7.50.3
  • Haxx » Curl » Version: 7.51.0
    cpe:2.3:a:haxx:curl:7.51.0
  • Haxx » Curl » Version: 7.52.0
    cpe:2.3:a:haxx:curl:7.52.0
  • Haxx » Curl » Version: 7.52.1
    cpe:2.3:a:haxx:curl:7.52.1
  • Haxx » Curl » Version: 7.53.0
    cpe:2.3:a:haxx:curl:7.53.0
  • Haxx » Curl » Version: 7.53.1
    cpe:2.3:a:haxx:curl:7.53.1
  • Haxx » Curl » Version: 7.54.0
    cpe:2.3:a:haxx:curl:7.54.0
  • Haxx » Curl » Version: 7.54.1
    cpe:2.3:a:haxx:curl:7.54.1
  • Haxx » Curl » Version: 7.55.0
    cpe:2.3:a:haxx:curl:7.55.0
  • Haxx » Curl » Version: 7.55.1
    cpe:2.3:a:haxx:curl:7.55.1
  • Haxx » Curl » Version: 7.56.0
    cpe:2.3:a:haxx:curl:7.56.0
  • Haxx » Curl » Version: 7.56.1
    cpe:2.3:a:haxx:curl:7.56.1
  • Haxx » Curl » Version: 7.57.0
    cpe:2.3:a:haxx:curl:7.57.0
  • Haxx » Curl » Version: 7.58.0
    cpe:2.3:a:haxx:curl:7.58.0
  • Haxx » Curl » Version: 7.59.0
    cpe:2.3:a:haxx:curl:7.59.0
  • Haxx » Curl » Version: 7.60.0
    cpe:2.3:a:haxx:curl:7.60.0
  • Haxx » Curl » Version: 7.61.0
    cpe:2.3:a:haxx:curl:7.61.0
  • Haxx » Curl » Version: 7.61.1
    cpe:2.3:a:haxx:curl:7.61.1
  • Haxx » Curl » Version: 7.62.0
    cpe:2.3:a:haxx:curl:7.62.0
  • Haxx » Curl » Version: 7.63.0
    cpe:2.3:a:haxx:curl:7.63.0
  • Haxx » Curl » Version: 7.64.0
    cpe:2.3:a:haxx:curl:7.64.0
  • Haxx » Curl » Version: 7.64.1
    cpe:2.3:a:haxx:curl:7.64.1
  • Haxx » Curl » Version: 7.65.0
    cpe:2.3:a:haxx:curl:7.65.0
  • Haxx » Curl » Version: 7.65.1
    cpe:2.3:a:haxx:curl:7.65.1
  • Haxx » Curl » Version: 7.65.2
    cpe:2.3:a:haxx:curl:7.65.2
  • Haxx » Curl » Version: 7.65.3
    cpe:2.3:a:haxx:curl:7.65.3
  • Haxx » Curl » Version: 7.66.0
    cpe:2.3:a:haxx:curl:7.66.0
  • Haxx » Curl » Version: 7.67.0
    cpe:2.3:a:haxx:curl:7.67.0
  • Haxx » Curl » Version: 7.68.0
    cpe:2.3:a:haxx:curl:7.68.0
  • Haxx » Curl » Version: 7.69.0
    cpe:2.3:a:haxx:curl:7.69.0
  • Haxx » Curl » Version: 7.69.1
    cpe:2.3:a:haxx:curl:7.69.1
  • Haxx » Curl » Version: 7.70.0
    cpe:2.3:a:haxx:curl:7.70.0
  • Haxx » Curl » Version: 7.71.0
    cpe:2.3:a:haxx:curl:7.71.0
  • Haxx » Curl » Version: 7.71.1
    cpe:2.3:a:haxx:curl:7.71.1
  • Haxx » Curl » Version: 7.72.0
    cpe:2.3:a:haxx:curl:7.72.0
  • Haxx » Curl » Version: 7.73.0
    cpe:2.3:a:haxx:curl:7.73.0
  • Haxx » Curl » Version: 7.74.0
    cpe:2.3:a:haxx:curl:7.74.0
  • Haxx » Curl » Version: 7.75.0
    cpe:2.3:a:haxx:curl:7.75.0
  • Haxx » Curl » Version: 7.76.0
    cpe:2.3:a:haxx:curl:7.76.0
  • Haxx » Curl » Version: 7.76.1
    cpe:2.3:a:haxx:curl:7.76.1
  • Haxx » Curl » Version: 7.77.0
    cpe:2.3:a:haxx:curl:7.77.0
  • Haxx » Curl » Version: 7.78.0
    cpe:2.3:a:haxx:curl:7.78.0
  • Haxx » Curl » Version: 7.79.0
    cpe:2.3:a:haxx:curl:7.79.0
  • Haxx » Curl » Version: 7.79.1
    cpe:2.3:a:haxx:curl:7.79.1
  • Haxx » Curl » Version: 7.80.0
    cpe:2.3:a:haxx:curl:7.80.0
  • Haxx » Curl » Version: 7.81.0
    cpe:2.3:a:haxx:curl:7.81.0
  • Haxx » Curl » Version: 7.82.0
    cpe:2.3:a:haxx:curl:7.82.0
  • Haxx » Curl » Version: 7.83.0
    cpe:2.3:a:haxx:curl:7.83.0
  • Haxx » Curl » Version: 7.83.1
    cpe:2.3:a:haxx:curl:7.83.1
  • Haxx » Curl » Version: 7.84.0
    cpe:2.3:a:haxx:curl:7.84.0
  • Haxx » Curl » Version: 7.85.0
    cpe:2.3:a:haxx:curl:7.85.0
  • Haxx » Curl » Version: 7.86.0
    cpe:2.3:a:haxx:curl:7.86.0
  • Haxx » Curl » Version: 7.87.0
    cpe:2.3:a:haxx:curl:7.87.0
  • Haxx » Curl » Version: 7.88.0
    cpe:2.3:a:haxx:curl:7.88.0
  • Haxx » Curl » Version: 7.88.1
    cpe:2.3:a:haxx:curl:7.88.1
  • Haxx » Curl » Version: 8.0.0
    cpe:2.3:a:haxx:curl:8.0.0
  • Haxx » Curl » Version: 8.0.1
    cpe:2.3:a:haxx:curl:8.0.1
  • Haxx » Curl » Version: 8.1.0
    cpe:2.3:a:haxx:curl:8.1.0
  • Haxx » Curl » Version: 8.1.1
    cpe:2.3:a:haxx:curl:8.1.1
  • Haxx » Curl » Version: 8.1.2
    cpe:2.3:a:haxx:curl:8.1.2
  • Haxx » Curl » Version: 8.10.0
    cpe:2.3:a:haxx:curl:8.10.0
  • Haxx » Curl » Version: 8.10.1
    cpe:2.3:a:haxx:curl:8.10.1
  • Haxx » Curl » Version: 8.11.0
    cpe:2.3:a:haxx:curl:8.11.0
  • Haxx » Curl » Version: 8.11.1
    cpe:2.3:a:haxx:curl:8.11.1
  • Haxx » Curl » Version: 8.12.0
    cpe:2.3:a:haxx:curl:8.12.0
  • Haxx » Curl » Version: 8.12.1
    cpe:2.3:a:haxx:curl:8.12.1
  • Haxx » Curl » Version: 8.13.0
    cpe:2.3:a:haxx:curl:8.13.0
  • Haxx » Curl » Version: 8.14.0
    cpe:2.3:a:haxx:curl:8.14.0
  • Haxx » Curl » Version: 8.14.1
    cpe:2.3:a:haxx:curl:8.14.1
  • Haxx » Curl » Version: 8.15.0
    cpe:2.3:a:haxx:curl:8.15.0
  • Haxx » Curl » Version: 8.16.0
    cpe:2.3:a:haxx:curl:8.16.0
  • Haxx » Curl » Version: 8.17.0
    cpe:2.3:a:haxx:curl:8.17.0
  • Haxx » Curl » Version: 8.18.0
    cpe:2.3:a:haxx:curl:8.18.0
  • Haxx » Curl » Version: 8.2.0
    cpe:2.3:a:haxx:curl:8.2.0
  • Haxx » Curl » Version: 8.2.1
    cpe:2.3:a:haxx:curl:8.2.1
  • Haxx » Curl » Version: 8.4.0
    cpe:2.3:a:haxx:curl:8.4.0
  • Haxx » Curl » Version: 8.5.0
    cpe:2.3:a:haxx:curl:8.5.0
  • Haxx » Curl » Version: 8.6.0
    cpe:2.3:a:haxx:curl:8.6.0
  • Haxx » Curl » Version: 8.7.0
    cpe:2.3:a:haxx:curl:8.7.0
  • Haxx » Curl » Version: 8.7.1
    cpe:2.3:a:haxx:curl:8.7.1
  • Haxx » Curl » Version: 8.8.0
    cpe:2.3:a:haxx:curl:8.8.0
  • Haxx » Curl » Version: 8.9.0
    cpe:2.3:a:haxx:curl:8.9.0
  • Haxx » Curl » Version: 8.9.1
    cpe:2.3:a:haxx:curl:8.9.1


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