CVE-2026-54763
CVE-2026-54763: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityCritical10.0
Critical [CVE-2026-54763] Identity spoofing via improper header handling in authentication middlewares
CVE-2026-54763Source published Source updated
Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares strip canonical-cased spoofed identity headers before writing Traefik's own value, but do not account for underscore-variant header names, which many backends normalize identically to dashed forms. An attacker able to reach a protected route can inject an underscore-variant header that survives Traefik's stripping and reaches the backend alongside, or on the unauthenticated ForwardAuth authResponseHeaders path instead of, the value Traefik intended to set, spoofing identity or authorization context. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6. This allows a remote attacker to inject a specially crafted header that…
- Affected products in this advisory
- Red Hat OpenShift Dev Spaces
- Source-reported affected versions
- < 11.51
- < 6.22
- < 7.6
- Source-reported fixed versions
- 11.51
- 6.22
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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