CVE-2026-7322
Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1
CVSS Score
7.3
EPSS Score
0.1%
EPSS Percentile
20th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 28, 2026 |
| Last Updated | May 7, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: 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 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-35/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-36/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-37/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-38/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-39/
Credits
C.M.Chang, Christian Holler, Steve Fink and the Mozilla Fuzzing Team