← Vulnerability feed

Vulnerability record · CVE-2026-63094 · published 17 July 2026

CVE-2026-63094: Insufficient verification of data authenticity vulnerability

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.

7.6 CVSS 4.0 High EPSS 0.26% · top 83.8% CWE-345 · Insufficient verification of data authenticityCWE-601 · Open redirect Deferred
7.6CVSS 4.0 base score
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
27 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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-token-theft

Track CVE-2026-63094 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2023-38831WinRAR ZIP archive spoofing leads to arbitrary code executionWinRAR before 6.23 mishandles ZIP archives that contain a benign file and a folder with the same name, causing the folder's contents to be processed …KEVEPSS 100%analysed9.8CVE-2022-26871Trend Micro Apex Central unauthenticated arbitrary file uploadTrend Micro Apex Central (and Apex One) contains an arbitrary file upload flaw caused by insufficient verification of data authenticity (CWE-345). An…KEVEPSS 19%analysed

Source: NIST National Vulnerability Database (record CVE-2026-63094), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.