CVE-2026-65986: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in cvat-ai cvat
CVAT versions 2.5.0 through 2.66.0 contain a cross-site scripting (XSS) vulnerability related to how annotation guide assets are served. An attacker can influence the Content-Type header of files attached to annotation guides, causing a victim's browser to interpret malicious files as HTML and execute embedded JavaScript. This vulnerability has been fixed in version 2.67.0.
AI Analysis
Technical Summary
The CVAT open source tool for video and image annotation has a CWE-79 (Improper Neutralization of Input During Web Page Generation) vulnerability in versions 2.5.0 through 2.66.0. The issue arises because CVAT labels files attached to annotation guides with a Content-Type header that can be manipulated by an attacker. This allows the victim's browser to treat uploaded files as HTML pages and execute arbitrary JavaScript code. The vulnerability is addressed in CVAT version 2.67.0.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking, data theft, or other malicious actions. The vulnerability requires user interaction and low privileges but has a high impact on confidentiality and integrity as per the CVSS 4.0 score of 8.5.
Mitigation Recommendations
Upgrade CVAT to version 2.67.0 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are indicated. Patch status is confirmed by the vendor's versioning information.
CVE-2026-65986: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in cvat-ai cvat
Description
CVAT versions 2.5.0 through 2.66.0 contain a cross-site scripting (XSS) vulnerability related to how annotation guide assets are served. An attacker can influence the Content-Type header of files attached to annotation guides, causing a victim's browser to interpret malicious files as HTML and execute embedded JavaScript. This vulnerability has been fixed in version 2.67.0.
CVSS v4.0
Score 8.5high
Affected software
cvat-ai
cvat
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The CVAT open source tool for video and image annotation has a CWE-79 (Improper Neutralization of Input During Web Page Generation) vulnerability in versions 2.5.0 through 2.66.0. The issue arises because CVAT labels files attached to annotation guides with a Content-Type header that can be manipulated by an attacker. This allows the victim's browser to treat uploaded files as HTML pages and execute arbitrary JavaScript code. The vulnerability is addressed in CVAT version 2.67.0.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking, data theft, or other malicious actions. The vulnerability requires user interaction and low privileges but has a high impact on confidentiality and integrity as per the CVSS 4.0 score of 8.5.
Mitigation Recommendations
Upgrade CVAT to version 2.67.0 or later, where this vulnerability has been fixed. No other official remediation or temporary fixes are indicated. Patch status is confirmed by the vendor's versioning information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-23T18:54:15.832Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a724e98bf8831d5396be701
Added to database: 08/04/2026, 20:42:00 UTC
Last enriched: 08/12/2026, 15:12:36 UTC
Last updated: 09/17/2026, 22:01:37 UTC
Views: 60
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