Critical severity9.6NVD Advisory· Published Jun 16, 2026· Updated Jul 15, 2026
CVE-2026-12297
CVE-2026-12297
Description
Sandbox escape due to incorrect boundary conditions in the Networking component. 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
31- osv-coords24 versionspkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7pkg: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%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%2012%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:apk/chainguard/firefoxpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/thunderbirdpkg:rpm/almalinux/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/firefox-x11pkg:apk/chainguard/firefox-esr
< 140.12.0-1.1+ 23 more
- (no CPE)range: < 140.12.0-1.1
- (no CPE)range: < 140.12-r0
- (no CPE)range: < 140.12.0-bp160.1.1
- (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: < 140.12.0-150200.152.242.1
- (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
- (no CPE)range: < 140.12.0-112.321.1
- (no CPE)range: < 140.12.0-160000.1.1
- (no CPE)range: < 140.12-r0
- (no CPE)range: < 140.12.0-1.1
- (no CPE)range: < 140.12.0-1.el9_8.alma.1
- (no CPE)range: < 140.12.0-1.el8_10.alma.1
- (no CPE)range: < 152.0-1.1
- (no CPE)range: < 140.12.0-1.el9_8.alma.1
- (no CPE)range: < 140.12-r0
prior to 152+ 3 more
- (no CPE)range: prior to 152
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.37.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <152.0.0
- (no CPE)range: <= 151
prior to 152, prior to 140.12+ 2 more
- (no CPE)range: prior to 152, prior to 140.12
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.12.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <152.0.0
Patches
Vulnerability mechanics
References
30- 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/show_bug.cginvdPermissions Required
- access.redhat.com/errata/RHSA-2026:27717nvd
- access.redhat.com/errata/RHSA-2026:27733nvd
- access.redhat.com/errata/RHSA-2026:27734nvd
- access.redhat.com/errata/RHSA-2026:29940nvd
- access.redhat.com/errata/RHSA-2026:30846nvd
- access.redhat.com/errata/RHSA-2026:33445nvd
- access.redhat.com/errata/RHSA-2026:36100nvd
- access.redhat.com/errata/RHSA-2026:36101nvd
- access.redhat.com/errata/RHSA-2026:36102nvd
- access.redhat.com/errata/RHSA-2026:36103nvd
- access.redhat.com/errata/RHSA-2026:37210nvd
- access.redhat.com/errata/RHSA-2026:37391nvd
- access.redhat.com/errata/RHSA-2026:38506nvd
- access.redhat.com/errata/RHSA-2026:38750nvd
- access.redhat.com/errata/RHSA-2026:38751nvd
- access.redhat.com/errata/RHSA-2026:38753nvd
- access.redhat.com/errata/RHSA-2026:39011nvd
- access.redhat.com/errata/RHSA-2026:39141nvd
- access.redhat.com/errata/RHSA-2026:39142nvd
- access.redhat.com/errata/RHSA-2026:39428nvd
- access.redhat.com/errata/RHSA-2026:39706nvd
- access.redhat.com/security/cve/CVE-2026-12297nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12297.jsonnvd
News mentions
2- 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