urllib's cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage
High-risk advisory
CVE-2026-55553
Summary
urllib's cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage
Why it matters
GitHub has published a reviewed security advisory for urllib. Prioritize it with other application dependency updates.
Operator check
Check whether urllib is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.