CVE-2026-7322

HIGH

Memory safety bugs fixed in Firefox ESR 115.35.1, Firefox ESR 140.10.1, Thunderbird ESR 140.10.1, Firefox 150.0.1 and Thunderbird 150.0.1

Title source: cna

Description

Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0 and Firefox 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.

References (6)

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021904%2C2022731%2C2027158%2C2027733%2C2027973%2C2027976%2C2028231%2C2028731%2C2028886%2C2029067%2C2029700%2C2029724%2C2029806%2C2029814%2C2030108%2C2030111%2C2031524%2C2031921%2C2032040

https://www.mozilla.org/security/advisories/mfsa2026-35/

https://www.mozilla.org/security/advisories/mfsa2026-36/

https://www.mozilla.org/security/advisories/mfsa2026-37/

https://www.mozilla.org/security/advisories/mfsa2026-38/

https://www.mozilla.org/security/advisories/mfsa2026-39/

Scores

CVSS v3 7.3

EPSS 0.0005

EPSS Percentile 15.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-119 CWE-416

Status published

Products (5)

Mozilla/Firefox 115.35.1 - 115.*

Mozilla/Firefox 140.10.1 - 140.*

Mozilla/Firefox 150.0.1

Mozilla/Thunderbird 140.10.1 - 140.*

Mozilla/Thunderbird 150.0.1

Published Apr 28, 2026

Tracked Since Apr 28, 2026