TI-2026-37904 Aliases CVE-2026-52794

Sentry: Inefficient Regular Expression Complexity in sentry

MEDIUM 40CWE-1333Published 2026-06-24 · Updated 2026-06-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

Sentry is an error tracking and performance monitoring tool. From 24.4.0 until 26.5.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Sentry's event ingestion pipeline, where a regex applied to attacker-controlled fields on incoming events can be made to consume disproportionate CPU time. This vulnerability is fixed in 26.5.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00545 45th percentileScored 2026-11-07

Fix Fixed sentry (getsentry): 26.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getsentry	sentry	24.4.0 to before 26.5.2	26.5.2	Patch available	CNA

sentry Vendorgetsentry Affected 24.4.0 to before 26.5.2 Fixed in 26.5.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sentry:sentry::::::::	24.4.0 to before 26.5.2	Vulnerable	Sentry

cpe:2.3:a:sentry:sentry:*:*:*:*:*:*:*:* Versions 24.4.0 to before 26.5.2 Vulnerable ·Sentry

Remediation

Fix · CNA sentry (getsentry) Fixed in 26.5.2

Timeline

2026-10-02 Threatist record created from CVE-2026-52794
2026-10-24 Priority changed: LOW → MEDIUM

References

Patch 1

https://github.com/getsentry/sentry/pull/116587

Advisory 1

https://github.com/getsentry/sentry/security/advisories/GHSA-jjqr-wqg2-p856

TI-2026-21018 Sentry allows unauthorized access to event data across organizational boundaries CVSS 4.0MEDIUM 5.7
TI-2026-30656 Sentry: Improper authentication on SAML SSO process allows user identity linking CVSS 3.1CRITICAL 9.8
TI-2026-78982 Sentry-Javascript: Middleware Bypass when using Tunnel route CVSS 4.0CRITICAL 9.1
TI-2025-16094 Improper authentication on SAML SSO process allows user impersonation in sentry CVSS 3.1CRITICAL 9.1
TI-2023-25212 Sentry Next.js vulnerable to SSRF via Next.js SDK tunnel endpoint CVSS 3.1CRITICAL 9.3
TI-2026-21634 Sentry: Improper Authentication on SAML SSO process allows user identity linking CVSS 3.1CRITICAL 9.1

See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences