CVE-2026-8390

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

CVSS 3.1

7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-26)

CWEs

CWE-416, CWE-825

Published

2026-05-12

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• mozilla:firefox

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2038081
• https://www.mozilla.org/security/advisories/mfsa2026-45/
• https://access.redhat.com/security/cve/CVE-2026-8390
• https://bugzilla.redhat.com/show_bug.cgi?id=2476474
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8390.json

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