JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4510-1 firefox-esr security update
Debian DLA Debian DLA DLA-4511-1 thunderbird security update
Debian DSA Debian DSA DSA-6178-1 firefox-esr security update
Debian DSA Debian DSA DSA-6179-1 thunderbird security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

References
Link Providers
https://access.redhat.com/errata/RHSA-2026:5930 cve-icon
https://access.redhat.com/errata/RHSA-2026:5931 cve-icon
https://access.redhat.com/errata/RHSA-2026:5932 cve-icon
https://access.redhat.com/errata/RHSA-2026:6188 cve-icon
https://access.redhat.com/errata/RHSA-2026:6342 cve-icon
https://access.redhat.com/errata/RHSA-2026:6917 cve-icon
https://access.redhat.com/errata/RHSA-2026:7837 cve-icon
https://access.redhat.com/errata/RHSA-2026:7838 cve-icon
https://access.redhat.com/errata/RHSA-2026:7839 cve-icon
https://access.redhat.com/errata/RHSA-2026:7840 cve-icon
https://access.redhat.com/errata/RHSA-2026:7841 cve-icon
https://access.redhat.com/errata/RHSA-2026:7842 cve-icon
https://access.redhat.com/errata/RHSA-2026:7843 cve-icon
https://access.redhat.com/errata/RHSA-2026:7845 cve-icon
https://access.redhat.com/errata/RHSA-2026:7858 cve-icon
https://access.redhat.com/errata/RHSA-2026:8284 cve-icon
https://access.redhat.com/errata/RHSA-2026:8285 cve-icon
https://access.redhat.com/errata/RHSA-2026:8286 cve-icon
https://access.redhat.com/errata/RHSA-2026:8287 cve-icon
https://access.redhat.com/errata/RHSA-2026:8288 cve-icon
https://access.redhat.com/errata/RHSA-2026:8289 cve-icon
https://access.redhat.com/errata/RHSA-2026:8290 cve-icon
https://access.redhat.com/errata/RHSA-2026:8315 cve-icon
https://access.redhat.com/errata/RHSA-2026:8427 cve-icon
https://access.redhat.com/errata/RHSA-2026:8850 cve-icon
https://access.redhat.com/security/cve/CVE-2026-4698 cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=2020906 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2450719 cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-4698 cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4698.json cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-4698 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-20/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-21/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-22/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4698 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-23/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-24/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4698 cve-icon
History

Fri, 22 May 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 13 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Thu, 26 Mar 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 26 Mar 2026 00:15:00 +0000


Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla firefox Esr
Vendors & Products Mozilla firefox Esr

Tue, 24 Mar 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Weaknesses CWE-843
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla
Mozilla firefox
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Tue, 24 Mar 2026 20:30:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
References

Tue, 24 Mar 2026 12:45:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
Title JIT miscompilation in the JavaScript Engine: JIT component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-07-15T02:48:33.583Z

Reserved: 2026-03-23T23:21:58.886Z

Link: CVE-2026-4698

cve-icon Vulnrichment

Updated: 2026-07-15T02:48:33.583Z

cve-icon NVD

Status : Modified

Published: 2026-03-24T13:16:05.783

Modified: 2026-07-15T02:22:50.283

Link: CVE-2026-4698

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-24T12:30:27Z

Links: CVE-2026-4698 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-22T16:00:14Z

Weaknesses