CVE-2025-66491

Risk Scores

Exploit Intelligence

• CIRCL seen: CVE-2025-66491 (circl-sighting)
• https://github.com/traefik/traefik/security/advisories/GHSA-7vww-mvcr-x6vj (circl)
• https://github.com/traefik/traefik/commit/14a1aedf5704673d875d210d7bacf103a43c77e4 (circl)
• https://github.com/traefik/traefik/releases/tag/v3.6.3 (circl)

Timeline

• Dec 8, 2025 CVE Published
• Dec 8, 2025 PoC Published
• Dec 9, 2025 EPSS Score
• Dec 13, 2025 EPSS Score
• Dec 17, 2025 EPSS Score
• Dec 22, 2025 EPSS Score
• Dec 26, 2025 EPSS Score
• Dec 30, 2025 EPSS Score
• Jan 3, 2026 EPSS Score
• Jan 7, 2026 EPSS Score
• Jan 12, 2026 EPSS Score
• Jan 16, 2026 EPSS Score

References

• https://cert.ssi.gouv.fr/avis/CERTFR-2025-AVI-1077/ advisory
• https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c advisory
• https://github.com/traefik/traefik/security/advisories/GHSA-7vww-mvcr-x6vj advisory