CVE-2026-65986

CVAT has stored XSS via annotation guide assets

State: Published
Severity: 8.5 High
Published: Aug 4, 2026
Updated: Aug 5, 2026
Reserved: Jul 23, 2026

Description

CVAT is an open source interactive video and image annotation tool for computer vision. Versions 2.5.0 through 2.66.0 contain a XSS vulnerability that can be accessed through annotation guide assets. When CVAT serves the files attached to an annotation guide, it labels them with a media type ( Content-Type ) that the attacker can influence, so instead of treating an uploaded file as plain data, the victim's browser can be told to treat it as an HTML page and run any JavaScript inside it. This issue has been fixed in version 2.67.0.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-434 Unrestricted Upload of File with Dangerous Type

Affected Products

Product	Versions
cvatcvat-ai	>= 2.5.0, < 2.67.0Affected

References

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