High8.7Red Hat & Ubuntu Linux
Insufficient validation of untrusted input in Site Isolation
CVE-2026-9903 Published May 27, 2026
CVE-2026-9903
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Insufficient validation of untrusted input in Site Isolation. Red Hat rates this important (CVSS 8.7). Weakness: CWE-1173. 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 5 hours ago·verify at source
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