High severity8.1NVD Advisory· Published Jun 16, 2026· Updated Jul 15, 2026
CVE-2026-12326
CVE-2026-12326
Description
Memory safety bugs present in Firefox 151 and Thunderbird 151. 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 152 and Thunderbird 152.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10<=151+ 2 more
- (no CPE)range: <=151
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <152.0.0
- (no CPE)range: <152
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <152.0.0
- (no CPE)range: <152
- osv-coords5 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 152-r0+ 4 more
- (no CPE)range: < 152-r0
- (no CPE)range: < 0
- (no CPE)range: < 152-r0
- (no CPE)range: < 152.0-1.1
- (no CPE)range: < 153.0-1.1
Patches
Vulnerability mechanics
References
8- www.mozilla.org/security/advisories/mfsa2026-57/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-60/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken Link
- bugzilla.mozilla.org/buglist.cginvdBroken Link
- bugzilla.mozilla.org/buglist.cginvdBroken Link
- access.redhat.com/security/cve/CVE-2026-12326nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12326.jsonnvd
News mentions
3- ⚡ Weekly Recap: Browser Bugs, EDR Killers, TV Botnet, OpenBSD Flaw, Android Trojan, and MoreThe Hacker News · Jun 22, 2026
- Multiple Vulnerabilities in Firefox 152 Enables Remote Code Execution AttacksCyber Security News · Jun 18, 2026
- Mozilla Patches 11 CVEs in Firefox and Thunderbird, Including Critical DOM BypassVypr Intelligence · Jun 16, 2026