CVE-2026-120421

Full vulnerability record from the local CVENow database.

Description

In Eclipse Mojarra versions 2.2.0 through 4.0.28, 4.1.0 through 4.1.19, and 5.0.0-M1 through 5.0.0-M11, when URL client window mode is enabled (`jakarta.faces.CLIENT_WINDOW_MODE=url`), the client window id from the `jfwid` or `jakarta.faces.ClientWindow` request parameter is appended to generated URLs without URL-encoding. `h:button` renders such a URL into a JavaScript string literal, which allows reflected cross-site scripting. With `com.sun.faces.enableCspNonce=true`, the injected script runs on page load inside the nonce script element, bypassing the Content Security Policy.

Severity

MEDIUM

CVSS score

6.1 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-04 15:17:41.590000

Last modified

2026-11-04 15:17:41.590000

View original CVE JSON

{
  "id": "CVE-2026-120421",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-04T15:17:41.590",
  "lastModified": "2026-11-04T15:17:41.590",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Eclipse Mojarra versions 2.2.0 through 4.0.28, 4.1.0 through 4.1.19, and 5.0.0-M1 through 5.0.0-M11, when URL client window mode is enabled (`jakarta.faces.CLIENT_WINDOW_MODE=url`), the client window id from the `jfwid` or `jakarta.faces.ClientWindow` request parameter is appended to generated URLs without URL-encoding. `h:button` renders such a URL into a JavaScript string literal, which allows reflected cross-site scripting. With `com.sun.faces.enableCspNonce=true`, the injected script runs on page load inside the nonce script element, bypassing the Content Security Policy."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Eclipse Foundation",
          "product": "Eclipse Mojarra",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.2.0",
              "lessThan": "4.0.29",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "4.1.0",
              "lessThan": "4.1.20",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.0.0-M1",
              "lessThan": "5.0.0-M12",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/536",
      "source": "[email protected]"
    },
    {
      "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/1332",
      "source": "[email protected]"
    }
  ]
}