CVE-2026-26004: Sentry is a developer-first error tracking and performance monitoring tool

Q: How do I fix CVE-2026-26004?

sentry: upgrade to 26.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-26004 being exploited?

CVE-2026-26004 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26004 affect?

CVE-2026-26004 affects sentry. Severity is medium (CVSS 6.5). 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 pat

Q: How urgent is CVE-2026-26004?

Priority 32/100. Public exploit reference

Routine

MEDIUM 6.5UPGRADE

CVE-2026-26004 is a medium-severity flaw (CVSS 6.5) affecting sentry. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 84%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-03-18
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: sentry

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-18 00:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

sentry sentry UPGRADE

Affected: < 26.1.0

Fixed in: 26.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sentry || rpm -q sentry || sentry --version

2. UPGRADE to 26.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sentry

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sentry

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26004?

sentry: upgrade to 26.1.0. Exact commands for each OS are on this page.

Is CVE-2026-26004 being exploited?

CVE-2026-26004 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26004 affect?

CVE-2026-26004 affects sentry. Severity is medium (CVSS 6.5). 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 pat

How urgent is CVE-2026-26004?

Priority 32/100. Public exploit reference

Related CVEs

CVE-2026-52794 HIGH 7.5 UPGRADE Sentry is an error tracking and performance monitoring tool
CVE-2026-42354 CRITICAL 9.1 UPGRADE Sentry is an error tracking and performance monitoring tool
CVE-2026-27197 CRITICAL 9.1 UPGRADE Sentry is a developer-first error tracking and performance monitoring tool
CVE-2025-53099 HIGH 7.5 UPGRADE Sentry is a developer-first error tracking and performance monitoring tool
CVE-2024-53253 MEDIUM 5.3 DOWNGRADE Sentry is an error tracking and performance monitoring platform

References

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