getsentry up to 26.1.x SAML improper authentication

Summaryinfo

A vulnerability was found in getsentry sentry up to 26.1.x. It has been classified as critical. This affects an unknown function of the component SAML Handler. Performing a manipulation results in improper authentication. This vulnerability is cataloged as CVE-2026-27197. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in getsentry sentry up to 26.1.x. It has been classified as critical. This affects an unknown code block of the component SAML Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-27197 since 02/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 26.2.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-7736). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• getsentry

Name

• sentry

Version

• 26.0
• 26.1

Website

• Product: https://github.com/getsentry/sentry/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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