CVE-2026-100775

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Graphics component

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Mozilla addressed this flaw in Firefox 157, Firefox ESR 153.4, Firefox ESR 140.17, and Firefox ESR 115.42 (and the corresponding Thunderbird releases); updating to a version that includes the upstream fix is the available remediation.