CVE-2026-63094

High

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.

SeverityHigh

CVSS8.1

Exploit probability—

ProductSignoz

PublishedJul 17, 2026

First seenJul 17, 2026

Weakness typeCWE-601Open redirect CWE-345CWE-345

How to fix

Update

SigNoz signoz0.134.0 or later

Patches

github.com/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619

Vendor advisories

github.com/SigNoz/signoz/releases/tag/v0.134.0

Affected products

Product	Affected versions	Fixed in
SigNoz signoz	v < 0.134.0	0.134.0

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