CVE-2026-8390

highpriority · track · 0EPSS 0.005 · 43 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.50% (43rd) EPSS

CVSS 7.5 · high

Is it mine?

14 products

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

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

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highAV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondaryexploitability 3.9 · impact 3.4

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 1.6 · impact 5.9

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1503Mozilla Firefox: Mehrere SchwachstellenDeutsch2026-05-12csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, darunter möglicherweise die Ausführung von Code, die Umgehung von Sicherheitsmaßnahmen, die Offenlegung oder Manipulation von Daten oder die Herbeiführung von Denial-of-Service-Zuständen.

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 2026-05-12modified 2026-10-26

External citations — patches, advisories, analysis.

scry

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