CVE-2026-57955

SigNoz versions from v0.98.0 up to v0.143.0, when configured with the opaque session tokenizer, do not revoke a user's existing login sessions when the user's password is reset with a reset token or when the user is deleted. An attacker who already holds a session token retains full access to the account, up to administrator, after a password reset until the token reaches its maximum lifetime (30 days by default), and after user deletion until the token next rotates (30 minutes by default).

SigNoz from v0.8.0 before v0.143.0 defaults the JWT tokenizer signing secret to an empty string, and Config.Validate() does not reject the empty value, so a deployment without a configured secret signs and verifies session tokens with an empty HMAC key. An unauthenticated attacker who knows an existing user's ID can forge a valid session token for that user, including an administrator.

SigNoz versions 0.87.0 before 0.142.0 fail to escape user-supplied telemetry field-key names in the v5 query_range API, allowing authenticated users to inject SQL. Attackers with Viewer role or higher can embed backticks and quotes in field names to break out of identifiers and string literals, executing arbitrary ClickHouse SQL to read system tables and exfiltrate data.

SigNoz versions from 0.88.0 before 0.142.1 contain a SQL injection vulnerability in trace-funnel analytics endpoints that interpolate service_name and span_name fields into ClickHouse string literals without escaping. An authenticated attacker can inject SQL through funnel step definitions to execute arbitrary queries and read results in HTTP responses.

SigNoz versions 0.88.0 through 0.141.0 fail to apply authorization wrappers to trace-funnel analytics endpoints in the HTTP handler. Unauthenticated attackers can submit arbitrary funnel definitions to retrieve trace analytics including identifiers, durations, span counts, service topology, and error activity without credentials.

An open redirect vulnerability in SigNoz before 0.134.0 in the SSO authentication flow. An unauthenticated attacker can steal session tokens from users on instances configured with Google OAuth, SAML, or OIDC.

A vulnerability in SigNoz before version 0.133.0 allows authenticated users to access alert rules of other organizations by supplying a target rule UUID. The alert rule store lacks filtering by organization ID, bypassing multi-tenant access controls.