What’s Vulnerable › Vulnerabilities

CVE-2024-34459

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-05-14 · updated 2026-10-15
• Weakness: CWE-122

Description

An issue was discovered in xmllint (from libxml2) before 2.11.8 and 2.12.x before 2.12.7. Formatting error messages with xmllint --htmlout can result in a buffer over-read in xmlHTMLPrintFileContext in xmllint.c.

Affected products

• xmlsoft libxml2: before 2.11.8; from 2.12.0 before 2.12.7 — fixed in 2.11.8, 2.12.7

How to fix

Upgrade to a fixed version: xmlsoft libxml2 2.11.8, 2.12.7. Check the vendor advisory for mitigations.

References

• https://gitlab.gnome.org/GNOME/libxml2/-/issues/720
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.11.8
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.12.7
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HVUXKYTBWT3G5DEEQX62STJQBY367NL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/INKSSLW5VMZIXHRPZBAW4TJUX5SQKARG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VRDJCNQP32LV56KESUQ5SNZKAJWSZZRI/
• https://gitlab.gnome.org/GNOME/libxml2/-/issues/720
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.11.8
• https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.12.7
• https://lists.debian.org/debian-lts-announce/2025/07/msg00014.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5HVUXKYTBWT3G5DEEQX62STJQBY367NL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/INKSSLW5VMZIXHRPZBAW4TJUX5SQKARG/

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