Vulnerability · Published Oct 14, 2026 · Assigned by GitHub_M

CVE-2026-102899Sentry: Improper authentication on SAML SSO process allows user identity linking

High 7.6

In plain English

A high-severity improper authentication in sentry from getsentry. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 4.0)7.6High

Exploit odds (30 days)0.4%top 69.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
getsentry	sentry	>= 26.5.0, < 26.7.2

Weakness: CWE-287 · Vector: 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

References

https://github.com/getsentry/sentry/security/advisories/GHSA-w699-8wff-fqxw x_refsource_CONFIRM
https://github.com/getsentry/sentry/pull/120467 x_refsource_MISC
https://github.com/getsentry/sentry/pull/120702 x_refsource_MISC
https://github.com/getsentry/sentry/commit/9c982d4bcb81c93e2db552084bcbb45cdd34bdd3 x_refsource_MISC
https://github.com/getsentry/sentry/commit/ec963de4ec8c7f340f286c6f613e55458a9e5ddf x_refsource_MISC
https://github.com/getsentry/self-hosted/releases/tag/26.7.2 x_refsource_MISC
https://github.com/getsentry/sentry/releases/tag/26.7.2 x_refsource_MISC