CVE-2026-8390

Use-after-free in the JavaScript: WebAssembly component

State: Published
Severity: 7.3 High
Published: May 12, 2026
Updated: Jul 15, 2026
Reserved: May 12, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	CISA-ADP
3.1	7.5 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat-SADP

Weaknesses

CWE-416 Use After Free
CWE-825 Expired Pointer Dereference

Affected Products

Product	Versions
FirefoxMozilla	150.0.3 and laterNot affected

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-2026-8390vdb-entry
RHBZ#2476474issue-tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8390.json

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