Medium severity6.5NVD Advisory· Published May 12, 2026· Updated May 19, 2026

CVE-2026-8388

Description

Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Mozilla Corporation/Firefoxinferred
osv-coords8 versions
pkg:apk/chainguard/firefox pkg:apk/chainguard/firefox-esr pkg:apk/wolfi/firefox pkg:rpm/almalinux/firefox pkg:rpm/almalinux/firefox-x11 pkg:rpm/almalinux/thunderbird pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweed
< 150.0.3-r0+ 7 more
- (no CPE)range: < 150.0.3-r0
- (no CPE)range: < 150.0.3-r0
- (no CPE)range: < 150.0.3-r0
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.el9_8.alma.1
- (no CPE)range: < 140.11.0-1.1
- (no CPE)range: < 140.11.1-1.1

Patches

Vulnerability mechanics

References

www.mozilla.org/security/advisories/mfsa2026-45/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required
www.mozilla.org/security/advisories/mfsa2026-47/nvd
www.mozilla.org/security/advisories/mfsa2026-48/nvd
www.mozilla.org/security/advisories/mfsa2026-51/nvd

News mentions

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cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000