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High severity7.3NVD Advisory· Published May 12, 2026· Updated Jul 15, 2026

CVE-2026-8390

CVE-2026-8390

Description

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.

AI Insight

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

Affected products

6

Mozilla Corporation/Firefoxinferred3 versions
<150.0.3+ 2 more
- (no CPE)range: <150.0.3
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <150.0.3
- (no CPE)range: = 150.0.3
osv-coords3 versions
pkg:apk/chainguard/firefox pkg:apk/chainguard/firefox-esr pkg:apk/wolfi/firefox
< 150.0.3-r0+ 2 more
- (no CPE)range: < 150.0.3-r0
- (no CPE)range: < 0
- (no CPE)range: < 150.0.3-r0

Patches

Vulnerability mechanics

References

5

www.mozilla.org/security/advisories/mfsa2026-45/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required
access.redhat.com/security/cve/CVE-2026-8390nvd
bugzilla.redhat.com/show_bug.cginvd
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8390.jsonnvd

News mentions

1

OpenAI Expands Daybreak With GPT-5.5-Cyber to Help Defenders Patch Security Flaws
The Hacker News · Jun 23, 2026