CVE-2026-8091

mediumcovered by 1 sourcefirst seen 2026-07-21

An attacker can exploit multiple vulnerabilities in Mozilla Firefox and Mozilla Firefox ESR to conduct an unspecified attack and execute arbitrary program code.

CSIRTS triage

What: Multiple vulnerabilities can be exploited to conduct an unspecified attack and execute arbitrary program code.
Who is affected: Users of Mozilla Firefox and Firefox ESR.
Urgency: Remediation is medium urgency due to the potential for arbitrary code execution.
Action: Update to the latest version of Mozilla Firefox and Firefox ESR.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.

Advisory coverage (1)

medium[UPDATE] [medium] Mozilla Firefox and Firefox ESR: Multiple vulnerabilitiescert-bund · 2026-07-21

External references

NVD record for CVE-2026-8091

CVE.org record

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