CVE-2026-42354

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

Published May 8, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-rcmw-7mc7-3rj7 Sentry's improper authentication on SAML SSO process allows user identity linking
History
Type Values Removed Values Added
First Time appeared Sentry
Sentry sentry
CPEs cpe:2.3:a:sentry:sentry:*:*:*:*:*:*:*:*
Vendors & Products Sentry
Sentry sentry
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Getsentry
Getsentry sentry
Vendors & Products Getsentry
Getsentry sentry
Type Values Removed Values Added
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.
Title Sentry: Improper authentication on SAML SSO process allows user identity linking
Weaknesses CWE-290
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 11, 2026, 2:37 PM
Reserved
Apr 26, 2026, 1:26 PM
Status
Analyzed
Published
May 8, 2026, 11:16 PM
Modified
Jul 24, 2026, 9:10 PM