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.
Published: 2026-07-17
Score: 7.6 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 27 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
Description SigNoz through 0.133.0 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. 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.
Title SigNoz 0.133.0 SSO OAuth State Manipulation Session Token Theft SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft
References

Tue, 21 Jul 2026 13:15:00 +0000

Type Values Removed Values Added
References

Tue, 21 Jul 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 17 Jul 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Signoz
Signoz signoz
Vendors & Products Signoz
Signoz signoz

Fri, 17 Jul 2026 15:00:00 +0000

Type Values Removed Values Added
Description SigNoz through 0.133.0 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.
Title SigNoz 0.133.0 SSO OAuth State Manipulation Session Token Theft
Weaknesses CWE-345
CWE-601
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': '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'}

Subscriptions

Signoz Signoz
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-07-27T17:17:11.454Z

Reserved: 2026-07-15T15:45:44.601Z

Link: CVE-2026-63094

cve-icon Vulnrichment

Updated: 2026-07-21T01:38:58.238Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-27T23:15:13Z

Weaknesses
  • CWE-345

    Insufficient Verification of Data Authenticity

  • CWE-601

    URL Redirection to Untrusted Site ('Open Redirect')