This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-93748 →

UBUNTU-CVE-2026-93748

http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unau...

Original description

The description as published by the source.

http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.

Source: OSV.dev (Open Source Vulnerabilities) OSV