CVE-2026-34840

Publication date

2026-04-02 18:52:48

Family

GitHub_M

State

PUBLISHED

Description

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptimes SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion, resulting in authentication bypass. This issue has been patched in version 10.0.42.