cve.bz

CVE-2026-63094

7.6 highEPSS 0.3%

High (7.6). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

7.6 high
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

8.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-31)
CWEs
CWE-345, CWE-601
Published
Modified
Record from
the NVD, synced

References

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