Information disclosure in the WebExtensions component in Firefox for Android

{
  "id": "e52ea39db42b68ccee90d255545cd1f8ba14988c3041fd2b6afe8406e14c4d92",
  "url": "https://osv.dev/vulnerability/CVE-2026-84127",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Information disclosure in the WebExtensions component in Firefox for Android",
    "summary": "Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.",
    "evidence": "osv:CVE-2026-84127",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-84127",
      "aliases": [
        "CVE-2026-84127"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mozilla-mobile/firefox-ios",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e085522364162451ad4c87a989e0e0a64b0b7d31"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "155.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "firefox-v154.1",
            "firefox-v153.3",
            "firefox-v153.0",
            "firefox-v152.1",
            "firefox-v151.1",
            "firefox-v151.0",
            "firefox-v150.1",
            "firefox-v149.2",
            "firefox-v149.0",
            "focus/klar-v148.2",
            "firefox-v148.1",
            "firefox-v147.5",
            "firefox-v147.4",
            "firefox-v146.1",
            "firefox-v145.2",
            "firefox-v144.3",
            "firefox-v144.2",
            "firefox-v144.1",
            "focus/klar-v143.0",
            "firefox-v142.0",
            "20.1",
            "AuroraV15",
            "AuroraV14",
            "AuroraV13",
            "AuroraV11",
            "AuroraV10",
            "AuroraV8",
            "AuroraV7",
            "AuroraV6",
            "AuroraV2",
            "AuroraV1",
            "AuroraV3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84127.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.459055598Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84127.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-84127",
        "https://www.mozilla.org/security/advisories/mfsa2026-82/",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1699444"
      ],
      "provider_metadata": {
        "cna_assigner": "mozilla",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84127.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84127",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518050,
  "published_at": "2026-09-01T12:18:54.776+00:00"
}