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TI-2026-21018 Aliases CVE-2026-26004

Sentry allows unauthorized access to event data across organizational boundaries

Priority MEDIUM 59CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Sentry is a developer-first error tracking and performance monitoring tool. Versions prior to 26.1.0 have a cross-organization Insecure Direct Object Reference (IDOR) vulnerability in Sentry's GroupEventJsonView endpoint. Version 26.1.0 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00256 17th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed sentry (getsentry): 26.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
getsentrysentrybefore 26.1.026.1.0Patch availableCNA
  • sentry Vendorgetsentry Affected before 26.1.0 Fixed in 26.1.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sentry:sentry:*:*:*:*:*:*:*:*before 26.1.0VulnerableSentry
  • cpe:2.3:a:sentry:sentry:*:*:*:*:*:*:*:* Versions before 26.1.0 Vulnerable ·Sentry

Remediation

  • Fix · CNA sentry (getsentry) Fixed in 26.1.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26004

References

Exploit 1

Patch 2

  • 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
  • TI-2026-37904 Sentry: Inefficient Regular Expression Complexity in sentry CVSS 3.1HIGH 7.5
See all 28 →

Sources

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