CVE-2026-42354CRITICAL 9.8EPSS p45.1%

CVE-2026-42354CVE-2026-42354

Description

Sentry is an error tracking and performance monitoring tool. From version 21.12.0 to before version 26.4.1, a critical vulnerability was discovered in the SAML SSO implementation of Sentry. The vulnerability allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. The victim email address must be known in order to exploit this vulnerability. This issue has been patched in version 26.4.1.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.62% probability of exploitation · percentile 45.1% · 2026-06-18T12:00:27Z
Published2026-05-08
Last modified2026-05-18

Underlying weaknesses· 1

CWE-290

References

  1. https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b
  2. https://github.com/getsentry/sentry/pull/113720
  3. https://github.com/getsentry/sentry/releases/tag/26.4.1
  4. https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7

1

TypeTargetConfidenceTier
WeaknessAuthentication Bypass by Spoofingcwe-2900%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.