Cyber Posture

CVE-2026-8090

High

Published: 07 May 2026

Published
07 May 2026
Modified
08 May 2026
KEV Added
—
Patch
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CVSS Score 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0002 3.6th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-8090 is a high-severity Use After Free (CWE-416) vulnerability in Mozilla Firefox. Its CVSS base score is 7.3 (High).

Operationally, ranked at the 3.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

NVD Description

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.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-416

Affected Products

mozilla
firefox
≤ 115.35.2 · ≤ 150.0.2 · 128.0 — 140.10.2
mozilla
thunderbird
≤ 140.10.2 · ≤ 150.0.2

CVEs Like This One

CVE-2026-6754Same product: Mozilla Firefox
CVE-2026-2758Same product: Mozilla Firefox
CVE-2025-1930Same product: Mozilla Firefox
CVE-2026-2770Same product: Mozilla Firefox
CVE-2026-2764Same product: Mozilla Firefox
CVE-2026-2797Same product: Mozilla Firefox
CVE-2026-2798Same product: Mozilla Firefox
CVE-2025-1009Same product: Mozilla Firefox
CVE-2026-0884Same product: Mozilla Firefox
CVE-2026-6746Same product: Mozilla Firefox

References