CVE-2026-63094 json
SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft
published 2026-07-17 3 mo ago modified 2026-11-08 27 h ago also EUVD-2026-45177
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- SigNoz signoz 0.134.0
- github.com/SigNoz/signoz@253ca7d commit
- github.com/SigNoz/signoz#12172 pull request
- github.com/SigNoz/signoz/releases/tag/v0.134.0 release
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/SigNoz/signoz/issues/11746 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.6 | 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 |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 7.6 | 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:X/V:X/RE:X/U:X |
Affected products
- SigNoz signoz
Classification
References
-
github.com
/SigNoz/signoz/pull/12172
issue-tracking, patch
-
github.com
/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619
patch
-
github.com
/SigNoz/signoz/issues/11746
technical-description, exploit, issue-tracking
-
github.com
/SigNoz/signoz/releases/tag/v0.134.0
release-notes
-
vulncheck.com
/advisories/signoz-sso-oauth-state-manipulation-session-token-theft
third-party-advisory
Sources
- CVE List CVE-2026-63094
- NVD CVE-2026-63094
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