CVE-2026-102899

7.6High

Published 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

7.6High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive
Impact: High impact on confidentiality, integrity
Weakness: CWE-287

Impact

Attackers controlling a SAML identity provider can take over a victim's Sentry account. To exploit this, they must socially engineer an authenticated user into clicking a malicious link in a browser accepting cross-site cookies.

Root cause

Improper authentication handling in the SAML SSO identity-linking flow permits unauthorized cross-site identity association.

Affected systems

Sentry 26.5.0 until 26.7.2

CVSS v4.0 · 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Fix & remediation

Upgrade self-hosted Sentry to version 26.7.2 or later (Sentry SaaS is already patched). No interim mitigation is specified.

shell

$ git fetch --tags && git checkout 26.7.2 && ./install.sh

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-102899