CVE-2026-53576
Unauthenticated Kestra REST API access can run as root.
Is CVE-2026-53576 being exploited?
Not confirmed. CVE-2026-53576 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 3.2% probability of exploitation in the next 30 days.
How severe is CVE-2026-53576?
CVE-2026-53576 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-53576?
Yes. A fix has been recorded for CVE-2026-53576. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53576 affect?
CVE-2026-53576 affects Kestra <=1.0.44, <=1.3.20. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53576?
Upgrade to 1.0.45 or 1.3.21 immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated REST API access allows triggering flows and executing Shell/Process tasks as root inside the container, with host Docker daemon access.
Immediate action required
- affected< 1.0.45
- affected>= 1.1.0 and < 1.3.21
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.