What is GHSA-r4c9-879g-3g2v?

GHSA-r4c9-879g-3g2v is a security advisory published by GitHub Security Advisories with High severity. Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows...

Which CVE IDs does GHSA-r4c9-879g-3g2v cover?

GHSA-r4c9-879g-3g2v covers the following CVE IDs: CVE-2026-119574. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-r4c9-879g-3g2v?

GHSA-r4c9-879g-3g2v has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

GHSA-r4c9-879g-3g2vHighCVSS 5.9

Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows...

Vendor

GitHub Security Advisories

Published

October 30, 2026

Last Modified

October 30, 2026

🔗 CVE IDs covered (1)

CVE-2026-119574 →

📋 Description

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 (4)

https://github.com/traefik/traefik/security/advisories/GHSA-ww7c-q3mv-xx22
https://nvd.nist.gov/vuln/detail/CVE-2026-119574
https://www.vulncheck.com/advisories/traefik-3.2.0-before-3.7.15-fastproxy-data-race-denial-of-service
https://github.com/advisories/GHSA-r4c9-879g-3g2v