High severity8.1NVD Advisory· Published Jun 16, 2026· Updated Jun 16, 2026
CVE-2026-12328
CVE-2026-12328
Description
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, 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, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
28cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 2 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <152.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.37.0
- (no CPE)range: <=151
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <152.0.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: >=140.0,<140.12.0
- (no CPE)range: <=151
- osv-coords22 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5
< 140.12.0-r0+ 21 more
- (no CPE)range: < 140.12.0-r0
- (no CPE)range: < 140.12.0-r0
- (no CPE)range: < 140.12.0-r0
- (no CPE)range: < 140.12.0-1.el8_10.alma.1
- (no CPE)range: < 140.12.0-1.el9_8.alma.1
- (no CPE)range: < 140.12.0-1.el9_8.alma.1
- (no CPE)range: < 140.12.0-1.1
- (no CPE)range: < 152.0-1.1
- (no CPE)range: < 140.12.0-1.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-112.321.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-150200.152.242.1
- (no CPE)range: < 140.12.0-112.321.1
Patches
Vulnerability mechanics
References
6- www.mozilla.org/security/advisories/mfsa2026-57/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-58/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-59/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-60/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-61/nvdVendor Advisory
- bugzilla.mozilla.org/buglist.cginvdBroken Link
News mentions
4- ⚡ 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 25 CVEs in Firefox and Thunderbird, Including Two Critical DOM Security BypassesVypr Intelligence · Jun 16, 2026
- Thunderbird: 25 CVEs Disclosed in Single Advisory, Two Critical DOM BypassesVypr Intelligence · Jun 16, 2026