CVE-2026-86137

EUVD-2026-71830
In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
2.9 LOW
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 8.57%
Affected Products (NVD)
VendorProductVersion
xmlsoftlibxml2
𝑥
< 2.15.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libxml2
bookworm
2.9.14+dfsg-1.3~deb12u6
fixed
bookworm (security)
2.9.14+dfsg-1.3~deb12u4
fixed
forky
2.15.4+dfsg-1
fixed
sid
2.15.4+dfsg-1
fixed
trixie
vulnerable
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libxml2
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libxml2
Amazon Linux 2
0:2.9.1-6.amzn2.5.27
fixed
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
libxml2-debuginfo
Amazon Linux 2
0:2.9.1-6.amzn2.5.27
fixed
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
libxml2-debugsource
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
libxml2-devel
Amazon Linux 2
0:2.9.1-6.amzn2.5.27
fixed
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
libxml2-python
Amazon Linux 2
0:2.9.1-6.amzn2.5.27
fixed
libxml2-static
Amazon Linux 2
0:2.9.1-6.amzn2.5.27
fixed
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
python3-libxml2
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
python3-libxml2-debuginfo
Amazon Linux 2023
0:2.10.4-1.amzn2023.0.21
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
libxml2
Azure Linux 3.0
0:2.11.5-11.azl3
fixed
Common Weakness Enumeration
References
https://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099