CVE-2026-33664: Kestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-s

Q: How do I fix CVE-2026-33664?

kestra: upgrade to newer than 1.3.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-33664 being exploited?

CVE-2026-33664 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-2026-33664 affect?

CVE-2026-33664 affects kestra. Severity is high (CVSS 7.3). Kestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields — description, inputs[].displayName, inputs[].description — through the Markdown.vue component i

Q: How urgent is CVE-2026-33664?

Priority 35/100. High severity; Public exploit reference

Routine

HIGH 7.3UPGRADE

CVE-2026-33664 is a high-severity flaw (CVSS 7.3) 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 Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields — description, inputs[].displayName, inputs[].description — through the Markdown.vue component instantiated with html: true. The resulting HTML is injected into the DOM via Vue's v-html without any sanitization. This allows a flow author to embed arbitrary JavaScript that executes in the browser of any us

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-26
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-03-26 22:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

kestra kestra UPGRADE

Affected: <= 1.3.3

Fixed in: newer than 1.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.3.3 (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.

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-2026-33664?

kestra: upgrade to newer than 1.3.3. Exact commands for each OS are on this page.

Is CVE-2026-33664 being exploited?

CVE-2026-33664 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-2026-33664 affect?

CVE-2026-33664 affects kestra. Severity is high (CVSS 7.3). Kestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields — description, inputs[].displayName, inputs[].description — through the Markdown.vue component i

How urgent is CVE-2026-33664?

Priority 35/100. High severity; Public exploit reference

Related CVEs

CVE-2026-49869 CRITICAL 10.0 EXPLOITED UPGRADE Kestra OSS OS Command Injection Vulnerability
CVE-2026-53576 CRITICAL 10.0 UPGRADE Kestra is an open-source, event-driven orchestration platform
CVE-2026-45807 HIGH 7.7 UPGRADE Kestra is an open-source, event-driven orchestration platform
CVE-2026-55069 HIGH 8.7 UPGRADE Kestra is an open-source, event-driven orchestration platform
CVE-2026-53577 MEDIUM 6.5 UPGRADE Kestra is an open-source, event-driven orchestration platform

References

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