CVE-2026-65986

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 8.5 / 10
CVSS 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
Effective score: 8.5 / 10 HIGH source: CNA overview
CWE(s): CWE-79, CWE-434
Reserved: 2026-07-23
Published: 2026-08-04 20:13 UTC
Last updated: 2026-08-04 20:13 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/65xxx/CVE-2026-65986.json
Linked Threat: CVE-2026-65986 — CVAT has stored XSS via annotation guide assets

Affected products (1)

Vendor	Product	Versions	Platforms
cvat-ai	cvat	`>= 2.5.0, < 2.67.0` (affected)	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

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

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-65986.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "cvat",
          "vendor": "cvat-ai",
          "versions": [
            {
              "status": "affected",
              "version": ">= 2.5.0, < 2.67.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 (\u00a0Content-Type\u00a0) 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-434",
              "description": "CWE-434: Unrestricted Upload of File with Dangerous Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T20:13:47.803Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cvat-ai/cvat/security/advisories/GHSA-w6mx-95ff-72cv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cvat-ai/cvat/security/advisories/GHSA-w6mx-95ff-72cv"
        },
        {
          "name": "https://github.com/cvat-ai/cvat/commit/44d717ad3a9d914f1cb2593ce09efd87d0b9159e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cvat-ai/cvat/commit/44d717ad3a9d914f1cb2593ce09efd87d0b9159e"
        }
      ],
      "source": {
        "advisory": "GHSA-w6mx-95ff-72cv",
        "discovery": "UNKNOWN"
      },
      "title": "CVAT has stored XSS via annotation guide assets"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-65986",
    "datePublished": "2026-08-04T20:13:47.803Z",
    "dateReserved": "2026-07-23T18:54:15.832Z",
    "dateUpdated": "2026-08-04T20:13:47.803Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}