Issued at: 2026-09-25
Updated at: 2026-09-25
Advisory content derived from Red Hat RHSA-2026:71586, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: libxml2 security update
Description
The libxml2 library is a development toolbox providing the implementation of various XML standards.
Security Fix(es):
* libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)
* libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)
* libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)
* libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)
* libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)
* libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.