CVE-2026-8927 — env-set cross-proxy Digest auth state leak
When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests…
Published: 2026-07-03 · CVSS: 9.1 · CVSS 3.1
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`.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7