Mozilla Firefox iOS patched remote code execution vulnerabilities
Mozilla patched remote code execution vulnerabilities in Firefox for iOS versions prior to 151.2.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 2 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.
The French ANSSI CERT has issued an advisory regarding multiple vulnerabilities discovered in Mozilla Firefox for iOS. These vulnerabilities, tracked as CVE-2026-9308 and CVE-2026-9309, allow an attacker to achieve remote arbitrary code execution on affected systems. The vulnerabilities impact all Firefox for iOS versions prior to 151.2.
Mozilla has released security bulletin MFSA2026-53 on June 1, 2026, addressing these issues. Users are advised to update to Firefox for iOS version 151.2 or later to remediate the vulnerabilities. The advisory emphasizes the remote exploitation vector and the potential for arbitrary code execution, indicating the severity of these flaws.
Organizations and individuals using Firefox for iOS should prioritize applying the available patches to mitigate the risk of remote compromise. Given the mobile platform target and remote execution capability, these vulnerabilities represent a significant threat to affected users.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0676
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