Description
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
References (6)
Core 6
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1929623
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-01/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-02/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-04/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-05/
Scores
CVSS v3
4.0
EPSS
0.0005
EPSS Percentile
15.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (7)
mozilla/firefox
< 128.6.0
mozilla/firefox
< 134.0
Mozilla/Firefox
128.6 - 128.*
Mozilla/Firefox
134
mozilla/thunderbird
< 128.6.0
Mozilla/Thunderbird
128.6 - 128.*
Mozilla/Thunderbird
134
Published
Jan 07, 2025
Tracked Since
Feb 18, 2026