Critical [CVE-2026-25940] PDF injection in AcroForm module allows arbitrary JavaScript execution (RadioButton children)
This critical-severity Red Hat Linux advisory covers CVE-2026-25940 affecting Red Hat Advanced Cluster Security for Kubernetes 4.8, Red Hat Advanced Cluster Security for Kubernetes 4.9, Red Hat Advanced Cluster Security 4.8.
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Summary
PDF injection in AcroForm module allows arbitrary JavaScript execution (RadioButton children). Red Hat rates this important (CVSS 9.6).
Weakness: CWE-116. Affected package(s): advanced-cluster-security/rhacs-main-rhel8:1775594119, advanced-cluster-security/rhacs-main-rhel8:1775594284.
Resolved in Red Hat advisory RHSA-2026:7110 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Advanced Cluster Security for Kubernetes 4.8; Red Hat Advanced Cluster Security for Kubernetes 4.9; Red Hat Advanced Cluster Security 4.8; Red Hat Advanced Cluster Security 4.9.
- advanced-cluster-security/rhacs-main-rhel8:1775594119
- advanced-cluster-security/rhacs-main-rhel8:1775594284
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:7110
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:7110 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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