RHSA-2026:71641 — Security Advisory
Red Hat Security Advisory: libxml2 security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · September 25, 2026
Updated · November 4, 2026
Topic
An update for libxml2 is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The libxml2 library is a development toolbox providing the implementation of various XML standards.
Security Fix(es):
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libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)
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libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)
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libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)
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libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)
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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.