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CVE-2026-11979 affects xmlsoft libxml2 through version 2.15.3. Multiple stack-based buffer overflows exist in the xmlcatalog utility's --shell mode. The usershell() function parses user-controlled input into fixed-size stack buffers, including command, arg, and argv, without adequate bounds checking. An excessively long input line corrupts the usershell() stack frame. The issue is fixed by libxml2 commit c2e233fc.
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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.
29 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting libxml2 on TencentOS Server 3. It requires local access and user interaction according to the CVSS v3 vector, and may result in high confidentiality, integrity, and availability impact.
A vulnerability referenced by the EulerOS SA-2026-3281 local-security-check plugin for libxml2-related packages on Huawei EulerOS 2.0. The content provides no technical flaw description or CVSS attribution specifically for this CVE.
A vulnerability addressed by Huawei EulerOS security advisory EulerOS_SA-2026-3356 affecting listed libxml2-related EulerOS packages.
A vulnerability identified as CVE-2026-11979 affecting Oracle Linux 8 libxml2-related packages, including libxml2, libxml2-devel, and python3-libxml2.
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.