CVE-2026-119574 (GCVE-0-2026-119574)
Vulnerability from cvelistv5
Published
2026-10-30 13:18
Modified
2026-10-30 15:17
Severity ?
8.2 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-567 - Unsynchronized Access to Shared Data in a Multithreaded Context
Summary
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
Impacted products
Vendor Product Version
traefik traefik Version: 3.2.0   ≤
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