CVE-2026-102899
Sentry: Improper authentication on SAML SSO process allows user identity linking
- State
- Published
- Severity
- 7.6 High
- Published
- Oct 14, 2026
- Updated
- Oct 15, 2026
- Reserved
- Sep 29, 2026
Description
Sentry is an application monitoring and error tracking platform. From 26.5.0 until 26.7.2, the SAML SSO identity-linking flow allows an attacker who controls a SAML identity provider to socially engineer an authenticated user into opening a malicious URL, link the attacker's identity to the victim's Sentry account, and take control of that account. The attack requires a browser that accepts the cross-site cookie context, including Firefox with SameSite=None cookies or Chromium with third-party cookies enabled. Sentry SaaS received the remediation on July 27, 2026, and self-hosted Sentry is fixed in version 26.7.2.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
sentrygetsentry |
|
References
- https://github.com/getsentry/sentry/security/advisories/GHSA-w699-8wff-fqxw
- https://github.com/getsentry/sentry/pull/120467
- https://github.com/getsentry/sentry/pull/120702
- https://github.com/getsentry/sentry/commit/9c982d4bcb81c93e2db552084bcbb45cdd34bdd3
- https://github.com/getsentry/sentry/commit/ec963de4ec8c7f340f286c6f613e55458a9e5ddf
- https://github.com/getsentry/self-hosted/releases/tag/26.7.2
- https://github.com/getsentry/sentry/releases/tag/26.7.2
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