VULNERABILITY INTELLIGENCE

CVE-2026-8927

CVSS score9.1 CRITICAL
EPSS probability0.50%
CISA KEVNot currently listed
Published2026-07-03
Last modified2026-09-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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`.

Weakness classification

  • 2499f714-1537-4658-8207-48ae4bb9eae9: CWE-294
  • nvd@nist.gov: CWE-294

Primary references