🛡️ CVE-2026-63094

🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-345 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-63094 is classified as CWE-345: Insufficient Verification of Data Authenticity. Data is trusted without confirming it really came from the claimed source and was not altered.

Affected software

CVE-2026-63094 is recorded against 1 package.

  • unknown

Timeline and source

Published on 17 July 2026 and last revised on 27 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
github.com
github.com
www.vulncheck.com

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE CWE-345
Public Exploit ✅ No
Source NVD
Published 2026-07-17
Updated 2026-08-11
Modified 2026-07-27
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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