CVE-2026-7323
Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
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, Thunderbird 150.0.1, and Thunderbird 140.10.1.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 28, 2026 |
| Last Updated | Jul 15, 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=2028537%2C2029911%2C2031121%2C2033602 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/mfsa2026-38/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-39/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-7323 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2463481 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7323.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22708 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22408 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24719 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19157 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19153 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19588 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:20586 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22712 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24718 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24345 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25014 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22847 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24717 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:21743 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22410 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24844 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22324 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24846 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22409 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24721 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19370 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19348
Credits
Ryan Hunt, Steve Fink and the Mozilla Fuzzing Team