CVE-2026-33664 is a stored Cross-Site Scripting (XSS) vulnerability affecting Kestra versions up to and including 1.3.3, where user-supplied flow YAML metadata fields are rendered without proper sanitization. This allows an authenticated attacker to inject arbitrary JavaScript into the browser of any user viewing or interacting with a malicious flow, potentially leading to information disclosure or integrity compromise, rated as Medium severity (CVSS 5.4). While user interaction is required for exploitation, there is currently no evidence of active exploitation, nor are public exploit codes available, and community discussion is minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.3.3CPE matchmatch criteria | cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.