User Impersonation Affecting sentry package, versions [21.12.0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-SENTRY-15325662
- published22 Feb 2026
- disclosed21 Feb 2026
- creditMuhammad Qasim Munir
Introduced: 21 Feb 2026
CVE-2026-27197 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to User Impersonation in the SAML SSO authentication process. An attacker can gain unauthorized access to user accounts by leveraging a malicious SAML Identity Provider and another organization configured on the same instance.
Notes:
- This is only exploitable if more than one organization is configured, and requires the malicious user to have permissions to modify SSO settings for another organization in a multi-organization instance.
- A fix was implemented in 26.2.1; however, Sentry has stopped publishing versions to PyPI (see https://github.com/getsentry/self-hosted/issues/1654)
Workaround
This vulnerability can be mitigated by implementing user account-based two-factor authentication, which prevents attackers from completing authentication with a victim's user account.