High8.8Red Hat & Ubuntu Linux
Arbitrary code execution due to improper enforcement of extension allow-list
CVE-2026-42266 Published May 13, 2026
CVE-2026-42266
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Arbitrary code execution due to improper enforcement of extension allow-list. Red Hat rates this important (CVSS 8.8). Weakness: CWE-88. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
Mitigation checklist
Recommended fix / mitigation
- Red Hat rates this important; a fix erratum may not be out yet — apply the RHSA as soon as it publishes.
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
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