Improper Authentication in sentry - CVE-2026-27197
Published: April 23, 2026
Vulnerability identifier: #VU126924
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27197
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to take over any user account.
The vulnerability exists due to improper authentication in the SAML SSO process when linking user identities through a malicious SAML identity provider in another organization on the same Sentry instance. A remote attacker can use a malicious SAML identity provider to link a victim's known email address to take over any user account.
For self-hosted deployments, exploitation requires a multi-organization instance and access to modify SSO settings for another organization.
Affected software
sentry
How to mitigate CVE-2026-27197
Install security update from vendor's website.
sentry - update to 26.2.0