CVE-2026-8927
env-set cross-proxy Digest auth state leak
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`.
INFO
Published Date :
July 3, 2026, 6:16 a.m.
Last Modified :
July 3, 2026, 6:16 a.m.
Remotely Exploit :
No
Source :
curl
Affected Products
The following products are affected by CVE-2026-8927
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Avoid reusing libcurl handles with changing proxy configurations.
- Ensure proxy authentication state is cleared between requests.
- Update libcurl to a version with this issue resolved.
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CVE-2026-8927 vulnerability anywhere in the article.