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Vulnerability record · CVE-2026-42354 · published 8 May 2026

CVE-2026-42354: Sentry authentication bypass by spoofing vulnerability

Sentry · Sentry

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.

9.8 CVSS 3.1 Critical EPSS 0.73% · top 47.6% CWE-290 · Authentication bypass by spoofing
9.8CVSS 3.1 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
24 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b Patch
https://github.com/getsentry/sentry/pull/113720 Issue TrackingPatch
https://github.com/getsentry/sentry/releases/tag/26.4.1 ProductRelease Notes
https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7 MitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42354), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.