CriticalFix available

firefox security update

Type: advisorySources: OSV

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. Security Fix(es): Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100756) Use-after-free in the Widget component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100757) Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100758) Uninitialized memory in the Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100759) Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100762) Information disclosure in the Networking: JAR component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Fir

Products: firefox
Affected versions: Not specified
Fixed versions: 140.17.0-1.oe2203sp4
CVEs: CVE-2026-100756, CVE-2026-100757, CVE-2026-100758, CVE-2026-100759, CVE-2026-100762, CVE-2026-100766, CVE-2026-100767, CVE-2026-100769, CVE-2026-100770, CVE-2026-100771, CVE-2026-100772, CVE-2026-100773, CVE-2026-100774, CVE-2026-100775, CVE-2026-100776, CVE-2026-100777, CVE-2026-100778, CVE-2026-100779, CVE-2026-100780, CVE-2026-100781, CVE-2026-100782, CVE-2026-100783, CVE-2026-100784, CVE-2026-100785, CVE-2026-100786, CVE-2026-100788, CVE-2026-100789, CVE-2026-100790, CVE-2026-100791, CVE-2026-100792, CVE-2026-100794, CVE-2026-100797, CVE-2026-100801, CVE-2026-100803, CVE-2026-100807, CVE-2026-100811, CVE-2026-100818, CVE-2026-100819, CVE-2026-100820, CVE-2026-100821, CVE-2026-100832, CVE-2026-92035, CVE-2026-96869
Confirmed fixed CVEs: Not specified
Updated in this feed: 30 Oct 2026, 20:40 UTC · Revision 1

Source evidence

firefox security update

core-osv · Original source

Published 16 Oct 2026, 11:59 UTC

osv:OESA-2026-4299

firefox

Fixed versions: 140.17.0-1.oe2203sp4

Complete source record

{
  "id": "0d150fdf31db365cd6445825f131d18f54fe587f4bd3b3be1ebfd83be0fbfe6d",
  "url": "https://osv.dev/vulnerability/OESA-2026-4299",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firefox security update",
    "summary": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. Security Fix(es): Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100756) Use-after-free in the Widget component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100757) Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100758) Uninitialized memory in the Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100759) Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.(CVE-2026-100762) Information disclosure in the Networking: JAR component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Fir",
    "evidence": "osv:OESA-2026-4299",
    "products": [
      {
        "name": {
          "value": "firefox",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "140.17.0-1.oe2203sp4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "OESA-2026-4299",
      "aliases": [
        "OESA-2026-4299"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "140.17.0-1.oe2203sp4"
                }
              ]
            }
          ],
          "package": {
            "name": "firefox",
            "purl": "pkg:rpm/openEuler/firefox&distro=openEuler-22.03-LTS-SP4",
            "ecosystem": "openEuler:22.03-LTS-SP4"
          },
          "database_specific": {
            "source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4299.json"
          },
          "ecosystem_specific": {
            "src": [
              "firefox-140.17.0-1.oe2203sp4.src.rpm"
            ],
            "x86_64": [
              "firefox-140.17.0-1.oe2203sp4.x86_64.rpm",
              "firefox-debuginfo-140.17.0-1.oe2203sp4.x86_64.rpm",
              "firefox-debugsource-140.17.0-1.oe2203sp4.x86_64.rpm"
            ],
            "aarch64": [
              "firefox-140.17.0-1.oe2203sp4.aarch64.rpm",
              "firefox-debuginfo-140.17.0-1.oe2203sp4.aarch64.rpm",
              "firefox-debugsource-140.17.0-1.oe2203sp4.aarch64.rpm"
            ]
          }
        }
      ],
      "modified": "2026-10-16T12:15:18.163293436Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-100756",
        "CVE-2026-100757",
        "CVE-2026-100758",
        "CVE-2026-100759",
        "CVE-2026-100762",
        "CVE-2026-100766",
        "CVE-2026-100767",
        "CVE-2026-100769",
        "CVE-2026-100770",
        "CVE-2026-100771",
        "CVE-2026-100772",
        "CVE-2026-100773",
        "CVE-2026-100774",
        "CVE-2026-100775",
        "CVE-2026-100776",
        "CVE-2026-100777",
        "CVE-2026-100778",
        "CVE-2026-100779",
        "CVE-2026-100780",
        "CVE-2026-100781",
        "CVE-2026-100782",
        "CVE-2026-100783",
        "CVE-2026-100784",
        "CVE-2026-100785",
        "CVE-2026-100786",
        "CVE-2026-100788",
        "CVE-2026-100789",
        "CVE-2026-100790",
        "CVE-2026-100791",
        "CVE-2026-100792",
        "CVE-2026-100794",
        "CVE-2026-100797",
        "CVE-2026-100801",
        "CVE-2026-100803",
        "CVE-2026-100807",
        "CVE-2026-100811",
        "CVE-2026-100818",
        "CVE-2026-100819",
        "CVE-2026-100820",
        "CVE-2026-100821",
        "CVE-2026-100832",
        "CVE-2026-92035",
        "CVE-2026-96869"
      ],
      "references": [
        "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4299",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100756",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100757",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100758",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100759",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100762",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100766",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100767",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100769",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100770",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100771",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100772",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100773",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100774",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100775",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100776",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100777",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100778",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100779",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100780",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100781",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100782",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100783",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100784",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100785",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100786",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100788",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100789",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100790",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100791",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100792",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100794",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100797",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100801",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100803",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100807",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100811",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100818",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100819",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100820",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100821",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100832",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92035",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-96869"
      ],
      "provider_metadata": {
        "severity": "Critical"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-100756",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100757",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100758",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100759",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100762",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100766",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100767",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100769",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100770",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100771",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100772",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100773",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100774",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100775",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100776",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100777",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100778",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100779",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100780",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100781",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100782",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100783",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100784",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100785",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100786",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100788",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100789",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100790",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100791",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100792",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100794",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100797",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100801",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100803",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100807",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100811",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100818",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100819",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100820",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100821",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-100832",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-92035",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-96869",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 340880,
  "published_at": "2026-10-16T11:59:06+00:00"
}