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Vulnerability in Mozilla Firefox for iOS (September 01, 2026)

unknownCVE-2026-81267
A vulnerability has been discovered in Mozilla Firefox for iOS. It allows an attacker to cause a security policy bypass.

CSIRTS triage

vendor: Mozillaproduct: Firefox for iOSMisconfiguration
What
Security policy bypass vulnerability in Firefox for iOS.
Who is affected
iOS users running affected versions of Mozilla Firefox for iOS.
Urgency
Severity unknown; policy bypass may affect sandbox or security feature integrity.
Action
Update Firefox for iOS to the latest available version.

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

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Details

Source
CERT-FR Avis de sécurité (FR · national-cert · site)
Severity
unknown
Published
2026-09-01
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1099/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-81267coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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