CVE-2026-65986

CVAT has stored XSS via annotation guide assets

HIGH
8.5
CVSS Score
Published: August 4, 2026 at 08:13 PM UTC
Updated: October 24, 2026 at 04:10 PM UTC
1 product affected across 1 vendorCvat

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Severity
HIGH8.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

>= 2.5.0, < 2.67.0
Affected range stops below 2.67.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.5HIGHGitHub_M
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79CWE-434

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