Firefox for iOS security bypass flaw patched
A Firefox for iOS vulnerability lets attackers bypass security policy protections; users should update to version 152.3 or later.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE 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.
CERT-FR issued an advisory regarding a security policy bypass vulnerability in Mozilla Firefox for iOS, affecting all versions prior to 152.3. The flaw is documented in Mozilla's security bulletin MFSA2026-65, published July 5, 2026, and tracked as CVE-2026-13356.
No evidence of active exploitation is mentioned in the advisory. Users and administrators are advised to update to the patched version as referenced in Mozilla's official security bulletin.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0839
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