Vulnerabilities CVE-2026-42354

CVE-2026-42354

Critical

Open

TLP:CLEAR

Sentry: Improper authentication on SAML SSO process allows user identity linking

NVD CVE.org

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Description

Sentry is an error tracking and performance monitoring tool. From version 21.12.0 to before version 26.4.1, a critical vulnerability was discovered in the SAML SSO implementation of Sentry. The vulnerability allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. The victim email address must be known in order to exploit this vulnerability. This issue has been patched in version 26.4.1.

Details

CVSS Score: 9.1
EPSS Score ⓘ: 0.62%

46.8th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Confidence: 90%
Published: May 8, 2026
Last Modified: May 8, 2026

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