High severity8.8NVD Advisory· Published Jul 21, 2026· Updated Sep 1, 2026
CVE-2026-16365
CVE-2026-16365
Description
Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153, Thunderbird 153, Firefox ESR 140.15, and Thunderbird 140.15.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
18- osv-coords14 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:apk/chainguard/firefox-docker-selenium-compatpkg:apk/wolfi/firefox-docker-selenium-compatpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/mozilla-nspr&distro=openSUSE%20Leap%2016.0pkg:apk/chainguard/firefoxpkg:rpm/almalinux/firefoxpkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/firefox-x11pkg:rpm/opensuse/rust-cbindgen&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/thunderbird
< 153.1.0-160000.1.2+ 13 more
- (no CPE)range: < 153.1.0-160000.1.2
- (no CPE)range: < 153.0-1.1
- (no CPE)range: < 153.0-r0
- (no CPE)range: < 153.0-r0
- (no CPE)range: < 153.0-r0
- (no CPE)range: < 153.0-1.1
- (no CPE)range: < 140.15.0-1.1
- (no CPE)range: < 4.39-160000.1.1
- (no CPE)range: < 153.0-r0
- (no CPE)range: < 140.15.0-1.el10_2
- (no CPE)range: < 3.125-160000.1.1
- (no CPE)range: < 140.15.0-1.el9_8.alma.1
- (no CPE)range: < 0.29.4+git0-160000.1.1
- (no CPE)range: < 140.16.0-1.el9_8.alma.1
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <153.0.0
- (no CPE)range: >=153
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <153.0
- (no CPE)range: >=153
Patches
Vulnerability mechanics
References
5- www.mozilla.org/security/advisories/mfsa2026-68/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-71/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- www.mozilla.org/security/advisories/mfsa2026-84/nvd
- www.mozilla.org/security/advisories/mfsa2026-87/nvd
News mentions
0No linked articles in our index yet.