# CVE-2026-27197: Sentry: Improper Authentication on SAML SSO process allows user identity linking

> CVE-2026-27197: Sentry: Improper Authentication on SAML SSO process allows user identity linking. CVSS 9.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-27197
Last updated: 2026-06-17T10:26:49Z

- Published: 2026-02-21 04:35 UTC · Updated: 2026-06-17 10:26 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: 0.49%, 42th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-287

## Description

Sentry is a developer-first error tracking and performance monitoring tool. Versions 21.12.0 through 26.1.0 have a critical vulnerability in its SAML SSO implementation  which allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. Self-hosted users are only at risk if the following criteria is met: ore than one organizations are configured (SENTRY\_SINGLE\_ORGANIZATION = True), or malicious user has existing access and permissions to modify SSO settings for another organization in a multo-organization instance. This issue has been fixed in version 26.2.0. To workaround this issue, implement user account-based two-factor authentication to prevent an attacker from being able to complete authentication with a victim's user account. Organization administrators cannot do this on a user's behalf, this requires individual users to ensure 2FA has been enabled for their account.

## 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-2026-27197)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-27197)
- [https://github.com/getsentry/sentry/security/advisories/GHSA-ggmg-cqg6-j45g](https://github.com/getsentry/sentry/security/advisories/GHSA-ggmg-cqg6-j45g)

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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-2026-27197 · Markdown: https://rewindex.com/cve/CVE-2026-27197.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-27197 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:35.296Z