Vulnerability Description
SigNoz before 0.134.0 contains an open redirect vulnerability in the SSO authentication flow that allows unauthenticated attackers to steal session tokens from any user on instances configured with Google OAuth, SAML, or OIDC. Attackers can call the unauthenticated sessions context endpoint with a ref parameter pointing to an attacker-controlled host, deliver the resulting crafted login URL to a victim, and receive the victim's access and refresh tokens when they complete SSO authentication.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619
- https://github.com/SigNoz/signoz/issues/11746
- https://github.com/SigNoz/signoz/pull/12172
- https://github.com/SigNoz/signoz/releases/tag/v0.134.0
- https://www.vulncheck.com/advisories/signoz-sso-oauth-state-manipulation-session
FAQ
What is CVE-2026-63094?
CVE-2026-63094 is a vulnerability with a CVSS score of 8.1 (HIGH). SigNoz before 0.134.0 contains an open redirect vulnerability in the SSO authentication flow that allows unauthenticated attackers to steal session tokens from any user on instances configured with Go...
How severe is CVE-2026-63094?
CVE-2026-63094 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63094?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.