Critical [CVE-2026-53622] mTLS enforcement bypass due to HTTP/3 TLS configuration flaw
This critical-severity Red Hat Linux advisory covers CVE-2026-53622.
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Summary
mTLS enforcement bypass due to HTTP/3 TLS configuration flaw. Red Hat rates this important (CVSS 9.1).
Weakness: CWE-289.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- To mitigate this issue, disable HTTP/3 (QUIC) on Traefik entrypoints. This prevents the TLS configuration selection flaw that leads to mTLS bypass. Consult Traefik documentation for specific configuration steps to disable HTTP/3. Restarting the Traefik service will be required for the changes to take effect.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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