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Sentry SaaS

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medium advisory

Sentry SAML SSO Improper Authentication Allows User Identity Linking

A critical vulnerability (CVE-2026-42354) exists in Sentry's SAML SSO implementation that allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance, affecting self-hosted users with multiple organizations configured if a malicious user has permissions to modify SSO settings, while Sentry SaaS was patched in April and self-hosted users are advised to upgrade to version 26.4.1 or higher.

sentry +1 authentication saml sso account takeover vulnerability
2r 1t