🔐 CVE Alert

CVE-2026-6758

UNKNOWN 0.0

Use-after-free in the JavaScript: WebAssembly component

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published Apr 21, 2026
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Affected Versions

Mozilla / Firefox
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2013619 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-30/

Credits

Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic