Mozilla Firefox patches multiple security flaws
ANSSI advises multiple Firefox vulnerabilities allow security policy bypass and other unspecified issues, fixed in versions 152.0.6 and 152.4 for iOS.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 3 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
ANSSI (CERT-FR) issued an advisory covering multiple vulnerabilities in Mozilla Firefox, disclosed via Mozilla security bulletins mfsa2026-66 and mfsa2026-67. The flaws allow an attacker to bypass security policy protections and include an additional issue not further specified by the vendor. Three CVEs are referenced: CVE-2026-14906, CVE-2026-15718, and CVE-2026-15719.
Affected versions are Firefox prior to 152.0.6 and Firefox for iOS prior to 152.4. No evidence of active exploitation is mentioned in the advisory. Users and administrators are advised to apply the vendor-supplied patches referenced in the Mozilla security bulletins to remediate the vulnerabilities.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0887
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