CVE-2026-8090

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

CVSS 3.1

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

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-26)

CWEs

CWE-416, CWE-825

Published

2026-05-07

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• mozilla:firefox
• mozilla:thunderbird

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2034352
• https://www.mozilla.org/security/advisories/mfsa2026-40/
• https://www.mozilla.org/security/advisories/mfsa2026-41/
• https://www.mozilla.org/security/advisories/mfsa2026-42/
• https://www.mozilla.org/security/advisories/mfsa2026-43/

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