Vulnerability · Published Aug 4, 2026 · Assigned by GitHub_M

CVE-2026-65986CVAT has stored XSS via annotation guide assets

High 8.5

In plain English

A high-severity cross-site scripting in cvat from cvat-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 4.0)8.5High

Exploit odds (30 days)0.4%top 65.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
cvat-ai	cvat	>= 2.5.0, < 2.67.0

Weakness: CWE-79, CWE-434 · Vector: 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

References

https://github.com/cvat-ai/cvat/security/advisories/GHSA-w6mx-95ff-72cv x_refsource_CONFIRM
https://github.com/cvat-ai/cvat/commit/44d717ad3a9d914f1cb2593ce09efd87d0b9159e x_refsource_MISC