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NVD Vulnerability Details :
CVE-2026-12299
Modified
More InfoOfficial Page
Source-security@mozilla.org
View Known Exploited Vulnerability (KEV) details
Published At-16 Jun, 2026 | 13:16
Updated At-30 Jun, 2026 | 13:17

JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A
Type: Secondary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Mozilla Corporation
mozilla
>>firefox>>Versions before 115.37.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions before 152.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions from 140.0(inclusive) to 140.12.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 152.0.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions from 140.0(inclusive) to 140.12.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Weaknesses
CWE IDTypeSource
CWE-843Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-733Secondary0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CWE ID: CWE-843
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-733
Type: Secondary
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2043139security@mozilla.org
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-57/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-58/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-59/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-60/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-61/security@mozilla.org
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:277170b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:277330b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:277340b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:299400b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:308460b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:334450b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/security/cve/CVE-2026-122990b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=24892120b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12299.json0b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2043139
Source: security@mozilla.org
Resource:
Permissions Required
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-57/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-58/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-59/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-60/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-61/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://access.redhat.com/errata/RHSA-2026:27717
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:27733
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:27734
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:29940
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:30846
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33445
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-12299
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2489212
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12299.json
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Change History
0Changes found
Details not found