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CVE-2026-42354

Sentry: Improper authentication on SAML SSO process allows user identity linking

Published: May 8, 2026Updated: May 18, 2026 Sources: CVE List NVDCWE-290
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.6%
Top 54.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-290

Affected Products

sentrygetsentry
SaaS
Enterprise Software / itsm-monitoring
sentrysentry
SaaS
Cloud & SaaS / saas-application
getsentrycommercialEnterprise Softwareaka sentry, sentry-javascript, sentry-python
sentrycommercialCloud & SaaSaka sentry software development kit, symbolicator, sentry

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/getsentry/sentry/security/advisories/GHSA-rcmw-7mc7-3rj7
github.com
https://github.com/getsentry/sentry/pull/113720
github.com
https://github.com/getsentry/sentry/commit/0c67558ae7fe08738912d4c5233b53ead048da3b
github.com
and 1 more references View all →

Timeline

Published
May 8, 2026
Last Updated
May 18, 2026

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