HIGH 8.2 NVD
CVE-2026-119574
Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1
Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared bufio.Reader and triggering an unrecovered panic that terminates Traefik.
References
- https://github.com/traefik/traefik/security/advisories/GHSA-ww7c-q3mv-xx22
- https://www.vulncheck.com/advisories/traefik-3.2.0-before-3.7.15-fastproxy-data-race-denia
This high severity vulnerability with a CVSS score of 8.2 was published on 2026-10-30 via NVD.
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