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CVE-2026-14241

CRITICAL

Memory safety bugs present in Firefox 152.0.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited…

Published
Jun 30, 2026
Updated
Jul 1, 2026
Affected
0 pkgs
Patched
None yet
Exploits
None indexed

Description

Memory safety bugs present in Firefox 152.0.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152.0.4.

Affected Products

1 product · 1 configurations
Application
firefoxmozilla
1 version
152.0.3

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every mozilla firefox deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Remediation status

    No patch has shipped for CVE-2026-14241 yet — track the mozilla firefox advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2026-14241 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2026-14241. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Memory safety bugs present in Firefox 152.0.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152.0.4.
O3 Security · Runtime Protection

Is CVE-2026-14241 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2026-14241 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

CVE-2026-14241: Firefox Out-of-bounds Write (Critical 9.8) | O3 Security