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CVE-2026-50219 is a use-after-free vulnerability in libexpat before version 2.8.2. libexpat did not track handler call depth when selected parser APIs were invoked re-entrantly from an application callback during policy-violation handling. Calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers could invalidate parser state while it remained in use, resulting in memory corruption.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by Oracle Linux advisory ELSA-2026-648090 affecting the listed Oracle Linux 8 Expat package context.
A vulnerability addressed by an Oracle Linux 9 update for expat and expat-devel.
A vulnerability addressed by the Rocky Linux RLSA-2026-64809 update affecting Expat packages on Rocky Linux 8; no technical flaw description is provided.
A vulnerability affecting Expat packages on Rocky Linux 10, including expat-devel, expat-debuginfo, and expat-debugsource. The content provides a CVSS v2 score of 7.2 (AV:L/AC:L/Au:N/C:P/I:P/A:P).
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.