What is CVE-2026-26004?

CVE-2026-26004 is a medium-severity vulnerability in Getsentry Sentry, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-03-18.

How severe is CVE-2026-26004?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Getsentry Sentry

CVE-2026-26004

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-03-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (15.6th percentile), scored 2026-09-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Getsentry Sentry — versions < 26.1.0
Sentry

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

securitylab.github.com/advisories/GHSL-2025-130_Sentry/ (Exploit, Third Party Advisory)
github.com/getsentry/sentry/pull/105601 (Patch, Issue Tracking)
github.com/getsentry/sentry/commit/45bc78fd57514a04eb62e73dd1eeb3ca2d723997 (Patch)

Frequently asked questions

What is CVE-2026-26004?: CVE-2026-26004 is a medium-severity vulnerability in Getsentry Sentry, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-03-18.
How severe is CVE-2026-26004?: Medium severity. CVSS v3 base score is 6.5 out of 10.