Is CVE-2026-124918 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-124918 being exploited in the wild.

How severe is CVE-2026-124918?

Informational severity, published 10 November 2026.

Which products and versions are affected?

Mozilla Firefox before 160; Mozilla Firefox ESR before 153.7.

Is there a fix for CVE-2026-124918?

Yes: fixed in Firefox 160, Firefox ESR 153.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-124918 attacked?

It is attacked over the network.

Am I affected by CVE-2026-124918?

Check whether you run Mozilla Firefox or Mozilla Firefox ESR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-124918: Firefox privilege escalation in Graphics: WebRender

CVE-2026-124918 · Severity: info · Published 2026-11-10

Firefox's graphics rendering engine (WebRender) contains a flaw that could allow a privilege escalation attack. An attacker exploiting this vulnerability could gain elevated system permissions on an affected computer, potentially compromising the entire system. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.

Technologies: Mozilla Firefox, Mozilla Firefox ESR. Vendors: Mozilla.

Quick answers

Is CVE-2026-124918 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-124918 being exploited in the wild.
How severe is CVE-2026-124918?: Informational severity, published 10 November 2026.
Which products and versions are affected?: Mozilla Firefox before 160; Mozilla Firefox ESR before 153.7.
Is there a fix for CVE-2026-124918?: Yes: fixed in Firefox 160, Firefox ESR 153.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-124918 attacked?: It is attacked over the network.
Am I affected by CVE-2026-124918?: Check whether you run Mozilla Firefox or Mozilla Firefox ESR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Firefox 160, Firefox ESR 153.7

Technical details

Incorrect boundary conditions in the Graphics: WebRender component allow privilege escalation. The vulnerability is triggered through the web browser's graphics rendering pipeline, requiring the attacker to deliver malicious content to the user. A successful exploit grants elevated privileges on the affected system.

Affected products

Mozilla Firefox before 160
Mozilla Firefox ESR before 153.7

Timeline

2026-11-10: disclosed

References

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