PT-2026-29966 · Undertow · Undertow
Published
2026-04-02
·
Updated
2026-04-02
None
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Name of the Vulnerable Software and Affected Versions
Undertow versions prior to 2.0.29-1ubuntu0.1~esm1
Description
Undertow incorrectly validated the Host header in incoming HTTP requests, potentially allowing a remote attacker to gain unintended access to user sessions.
Recommendations
Update libundertow-java to version 2.0.29-1ubuntu0.1~esm1 or later.
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Related Identifiers
Affected Products
Undertow