CVE-2026-8927

Description

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against `proxyA` using Digest auth, a subsequent transfer routed through `proxyB` erroneously leaks the `Proxy-Authorization:` header intended solely for `proxyA`.

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Produits concernés

• curl
• Haxx curl

Scores CVSS

Faiblesses (CWE)

• CWE-294

Références

• https://curl.se/docs/CVE-2026-8927.html PatchVendor Advisory
• https://curl.se/docs/CVE-2026-8927.json Vendor Advisory
• https://hackerone.com/reports/3744543 ExploitIssue TrackingThird Party Advisory
• https://hackerone.com/reports/3744543 ExploitIssue TrackingThird Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories