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CVE-2026-53576: Kestra is an open-source, event-driven orchestration platform

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This week
CRITICAL 10.0REMOTEUPGRADE

CVE-2026-53576 is a critical-severity flaw (CVSS 10.0) affecting kestra. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/**")) treats any request whose path ends in /configs as the public instance-config endpoint and forwards it without a credential check. kestra addresses its resources by URL path segments that the caller chooses (/api/v1/{tenant}/flows/{namespace}, /api/v1/{tenant}/executions/{namespace}/{id}, /ap

Why this priority

  • Critical severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score10.0 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance3.3% (top 12%)
CISA exploited listNo
WeaknessCWE-94, CWE-288
Published2026-06-26
Last modified2026-10-25
Publisher (CNA): GitHub, Inc. · Vendor: kestra

Share: LinkedIn · X · Reddit

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

kestra kestra UPGRADE
Affected: < 1.0.45 · >= 1.1.0 and < 1.3.21
Fixed in: 1.0.45, 1.3.21
Safe to downgrade to: a release before 1.1.0
1. Check installed version
apt-cache policy kestra || rpm -q kestra || kestra --version
2. UPGRADE to 1.0.45 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade kestra
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade kestra
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 1.1.0 (Debian / Ubuntu)
apt-cache madison kestra sudo apt install kestra=<VERSION_BEFORE_1.1.0> sudo apt-mark hold kestra
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list kestra sudo dnf downgrade kestra-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add kestra
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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

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-2026-53576?

kestra: upgrade to 1.0.45, 1.3.21. Exact commands for each OS are on this page.

Is CVE-2026-53576 being exploited?

CVE-2026-53576 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-2026-53576 affect?

CVE-2026-53576 affects kestra. Severity is critical (CVSS 10.0). Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/**")) treats any request whose path ends in /configs as the public instance-config endpo

How urgent is CVE-2026-53576?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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