What is CVE-2026-63094?

CVE-2026-63094 is a high-severity vulnerability in Signoz, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.1/10. Published 2026-07-17.

How severe is CVE-2026-63094?

High severity. CVSS v3 base score is 8.1 out of 10.

Open Redirect in Signoz

CVE-2026-63094

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.

EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Signoz — versions 253ca7dd7eb4f7a32a694c249eb0d5d0804d5619, 0

Weakness classification (CWE)

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (release-notes)

Frequently asked questions

What is CVE-2026-63094?: CVE-2026-63094 is a high-severity vulnerability in Signoz, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.1/10. Published 2026-07-17.
How severe is CVE-2026-63094?: High severity. CVSS v3 base score is 8.1 out of 10.