High [CVE-2026-113356] Arbitrary code execution via insecure draft deserialization
This high-severity Red Hat Linux advisory covers CVE-2026-113356.
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Summary
Arbitrary code execution via insecure draft deserialization. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-502.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 12 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 12 hours ago·verify at source
Mitigation checklist
- 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. --- CME Mitigation Guidance (2026-10-20) --- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. The highest-value action is to enforce class allowlisting during deserialization to disallow instantiation of arbitrary PHP objects from draft and cache files: upgrade to DokuWiki 2026-07-14c (or the fixed Dokuwiki builds), which restrict unserialize() by setting allowed_classes to false for drafts, metadata, and extension caches, and allowed_classes to stdClass for instruction caches, closing concurrent draft write race condition splicing serialized payloads. Until patched, this is a concern on DokuWiki deployments with draft functionality (usedraft) enabled and page edit access, so disable the usedraft configuration setting and restrict or audit accounts with page edit privileges or anonymous edit access. These controls limit blast radius and contain exploitation, but they do not fix the underlying insecure deserialization defect — apply the upstream patch to fully remediate. Highest-impact CME: CME-1302 Deserialization Allowlist (Safe Loading) (high)
Official advisory · high-confidence parse· fetched 12 hours ago·verify at source
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