CVE-2026-27197: Sentry is a developer-first error tracking and performance monitoring tool

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-27197 is a critical-severity flaw (CVSS 9.1) 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 21.12.0 through 26.1.0 have a critical vulnerability in its SAML SSO implementation which allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. Self-hosted users are only at risk if the following criteria is met: ore than one organizations are configured (SENTRY_SINGLE_O

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-02-21
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

2026-02-21 05:17 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

sentry sentry UPGRADE

Affected: >= 21.12.0 and < 26.2.0

Fixed in: 26.2.0

Safe to downgrade to: a release before 21.12.0

1. Check installed version

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

2. UPGRADE to 26.2.0 (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.

3. If no update is available yet, DOWNGRADE to a release before 21.12.0 (Debian / Ubuntu)

apt-cache madison sentry sudo apt install sentry=<VERSION_BEFORE_21.12.0> sudo apt-mark hold sentry

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sentry sudo dnf downgrade sentry-<VERSION_BEFORE_21.12.0> sudo dnf versionlock add sentry

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-27197?

sentry: upgrade to 26.2.0. Exact commands for each OS are on this page.

Is CVE-2026-27197 being exploited?

CVE-2026-27197 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-2026-27197 affect?

CVE-2026-27197 affects sentry. Severity is critical (CVSS 9.1). Sentry is a developer-first error tracking and performance monitoring tool. Versions 21.12.0 through 26.1.0 have a critical vulnerability in its SAML SSO implementation which allows an attacker to take over any user account by using a mali

How urgent is CVE-2026-27197?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

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-2026-26004 MEDIUM 6.5 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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