CURL-CVE-2026-8927

vendorUSosv

env-set cross-proxy Digest auth state leak

view advisory published 2026-06-24Licence: per source

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`.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-8927US—OT elevated—
When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. S…
scry

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