CVE-2026-8390
A remote, anonymous attacker can exploit multiple vulnerabilities in Mozilla Firefox to conduct unspecified attacks, potentially including code execution, bypassing security measures, disclosing or manipulating data, or causing Denial-of-Service conditions.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to conduct unspecified attacks, potentially including code execution and data manipulation.
- Who is affected
- Users of Mozilla Firefox are affected.
- Urgency
- Remediation is urgent due to the high severity and potential for exploitation.
- Action
- Update to the latest version of Mozilla Firefox.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-8390
Get an email if CVE-2026-8390 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
Advisory coverage (1)
- high[UPDATE] [high] Mozilla Firefox: Multiple vulnerabilitiescert-bund · 2026-07-09
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-8390)