CVE-2026-4698
Detail
Modified After Enrichment
This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Current Description
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.
View Analysis Description
Analysis
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
References to Advisories, Solutions, and Tools
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Change History
8 change records found show changes
CVE Modified by CISA-ADP
6/17/2026 6:57:03 AM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2026-05-22T03:55:50.217332Z","id":"CVE-2026-4698","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by Mozilla Corporation
6/17/2026 6:57:03 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.34","lessThanOrEqual":"115.*","versionType":"rpm","status":"unaffected"},{"version":"140.9","lessThanOrEqual":"140.*","versionType":"rpm","status":"unaffected"},{"version":"149","lessThanOrEqual":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.9","lessThanOrEqual":"140.*","versionType":"rpm","status":"unaffected"},{"version":"149","lessThanOrEqual":"*","versionType":"rpm","status":"unaffected"}]}]
|
CVE Modified by CISA-ADP
5/22/2026 10:16:27 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
|
| Removed |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
CVE Modified by Mozilla Corporation
4/13/2026 11:17:39 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
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.
|
CVE Modified by CISA-ADP
3/26/2026 9:16:29 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CWE |
CWE-843
|
CVE Modified by Mozilla Corporation
3/24/2026 5:16:31 PM
| Action |
Type |
Old Value |
New Value |
| Changed |
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.
|
| Added |
Reference |
https://www.mozilla.org/security/advisories/mfsa2026-23/
|
| Added |
Reference |
https://www.mozilla.org/security/advisories/mfsa2026-24/
|
Initial Analysis by NIST
3/24/2026 4:34:24 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CWE |
CWE-843
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* versions up to (excluding) 149.0
*cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* versions up to (excluding) 115.34.0
*cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* versions from (including) 128.0 up to (excluding) 140.9.0
|
| Added |
Reference Type |
Mozilla Corporation: https://bugzilla.mozilla.org/show_bug.cgi?id=2020906 Types: Permissions Required
|
| Added |
Reference Type |
Mozilla Corporation: https://www.mozilla.org/security/advisories/mfsa2026-20/ Types: Vendor Advisory
|
| Added |
Reference Type |
Mozilla Corporation: https://www.mozilla.org/security/advisories/mfsa2026-21/ Types: Vendor Advisory
|
| Added |
Reference Type |
Mozilla Corporation: https://www.mozilla.org/security/advisories/mfsa2026-22/ Types: Vendor Advisory
|
New CVE Received from Mozilla Corporation
3/24/2026 9:16:05 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Description |
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
|
| Added |
Reference |
https://bugzilla.mozilla.org/show_bug.cgi?id=2020906
|
| Added |
Reference |
https://www.mozilla.org/security/advisories/mfsa2026-20/
|
| Added |
Reference |
https://www.mozilla.org/security/advisories/mfsa2026-21/
|
| Added |
Reference |
https://www.mozilla.org/security/advisories/mfsa2026-22/
|
Quick Info
CVE Dictionary Entry: CVE-2026-4698 NVD
Published Date: 03/24/2026 NVD
Last Modified: 06/17/2026
Source: Mozilla Corporation
|
