Critical severity9.8NVD Advisory· Published Jul 21, 2026· Updated Jul 24, 2026
CVE-2026-16361
CVE-2026-16361
Description
Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.
Affected products
11cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.13.0
- (no CPE)range: <140.13
- osv-coords8 versionspkg:apk/chainguard/firefox-esrpkg:apk/chainguard/firefox-esr-140pkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 153.0-r1+ 7 more
- (no CPE)range: < 153.0-r1
- (no CPE)range: < 140.13.0-r0
- (no CPE)range: < 140.13.0-1.el10_2
- (no CPE)range: < 140.13.0-1.el9_8.alma.1
- (no CPE)range: < 140.13.0-1.el10_2.alma.1
- (no CPE)range: < 140.13.0-160000.1.1
- (no CPE)range: < 140.13.0-1.1
- (no CPE)range: < 140.13.0-1.1
Patches
Vulnerability mechanics
References
4- www.mozilla.org/security/advisories/mfsa2026-69/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-70/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-72/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken Link
News mentions
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