CVE-2026-63094 SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft
Attackers can steal session tokens via open redirect in SSO flow, leading to account takeover on instances with OAuth or SAML enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-63094?
CVE-2026-63094 is a high-severity vulnerability in signoz, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-63094?
How do I fix CVE-2026-63094?
No fix has been published for CVE-2026-63094 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-63094 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63094 exists.
Sources
Also known as GHSA-xmw5-w4c2-cp2g.