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CVE-2026-56412 is a use-after-free vulnerability in libexpat before 2.8.2. The doCdataSection processing path does not account for XML_TOK_DATA_CHARS when tracking handler call depth during policy-violation handling. Consequently, certain calls made from XML handlers can re-enter or alter parser state without the required lifetime protection, permitting an object to be freed while it remains in use. The flaw is an incomplete remediation of CVE-2026-50219.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by Huawei EulerOS security advisory SA-2026-3583; the supplied CVSS v2 vector indicates a locally exploitable flaw with partial confidentiality, integrity, and availability impact.
A vulnerability addressed by Huawei's EulerOS_SA-2026-3637 security advisory for EulerOS UVP 2.12.0. The supplied CVSS v2 vector indicates local access with partial confidentiality, integrity, and availability impact.
A use-after-free vulnerability in libexpat before version 2.8.2 arising from incomplete remediation of CVE-2026-50219 and missing handler call-depth tracking in doCdataSection.
A vulnerability in the EulerOS 2.0 Expat package set, scored with CVSS v2 as requiring local access and having partial confidentiality, integrity, and availability impact.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.