# CVE-2026-42354: Sentry: Improper authentication on SAML SSO process allows user identity linking

> CVE-2026-42354: Sentry: Improper authentication on SAML SSO process allows user identity linking. CVSS 9.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-42354
Last updated: 2026-07-24T21:10:00Z

- Published: 2026-05-08 22:58 UTC · Updated: 2026-07-24 21:10 UTC · Assigner: GitHub\_M
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.62%, 50th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-290

## 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.

## Affected vendors and products

- getsentry: sentry

## Tracked companies

- [Sentry](https://rewindex.com/company/sentry.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-42354)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-42354)
- [https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b](https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b)
- [https://github.com/getsentry/sentry/pull/113720](https://github.com/getsentry/sentry/pull/113720)
- [https://github.com/getsentry/sentry/releases/tag/26.4.1](https://github.com/getsentry/sentry/releases/tag/26.4.1)
- [https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7](https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-42354 · Markdown: https://rewindex.com/cve/CVE-2026-42354.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-42354 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:26.407Z