CVE-2026-7322
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 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, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 0.32% probability · 24th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-416, CWE-787
- Affected
- mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
References
- 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%2C2032040Broken Link
- https://www.mozilla.org/security/advisories/mfsa2026-35/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-37/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-38/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-39/Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:19153
- https://access.redhat.com/errata/RHSA-2026:19157
- https://access.redhat.com/errata/RHSA-2026:19348
- https://access.redhat.com/errata/RHSA-2026:19370
- https://access.redhat.com/errata/RHSA-2026:19588
- https://access.redhat.com/errata/RHSA-2026:20586
- https://access.redhat.com/errata/RHSA-2026:21743
- https://access.redhat.com/errata/RHSA-2026:22324
- https://access.redhat.com/errata/RHSA-2026:22408
- https://access.redhat.com/errata/RHSA-2026:22409
- https://access.redhat.com/errata/RHSA-2026:22410
- https://access.redhat.com/errata/RHSA-2026:22708
- https://access.redhat.com/errata/RHSA-2026:22712
- https://access.redhat.com/errata/RHSA-2026:22847
- https://access.redhat.com/errata/RHSA-2026:24345
- https://access.redhat.com/errata/RHSA-2026:24717
- https://access.redhat.com/errata/RHSA-2026:24718
- https://access.redhat.com/errata/RHSA-2026:24719
- https://access.redhat.com/errata/RHSA-2026:24721
- https://access.redhat.com/errata/RHSA-2026:24844
- https://access.redhat.com/errata/RHSA-2026:24846
- https://access.redhat.com/errata/RHSA-2026:25014
- https://access.redhat.com/security/cve/CVE-2026-7322
- https://bugzilla.redhat.com/show_bug.cgi?id=2463484
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.