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Fencer Vulns
low 3.3

CVE-2025-8732 json

libxml2 xmlcatalog xmlParseSGMLCatalog recursion

published 2025-08-08 15 mo ago modified 2026-07-01 4 mo ago also EUVD-2025-24001

cvss
3.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

A vulnerability was found in libxml2 up to 2.14.5. It has been declared as problematic. This vulnerability affects the function xmlParseSGMLCatalog of the component xmlcatalog. The manipulation leads to uncontrolled recursion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains, that "[t]he issue can only be triggered with untrusted SGML catalogs and it makes absolutely no sense to use untrusted catalogs. I also doubt that anyone is still using SGML catalogs at all."

Patch / fix

  • Siemens RUGGEDCOM RST2428P V4.0
  • libxml2 Debian 12 2.9.14+dfsg-1.3~deb12u6
  • libxml2 Debian 13 2.12.7+dfsg+really2.9.14-2.1+deb13u3
  • libxml2 Debian 14 2.15.2+dfsg-0.1

debian advisories DEBIAN-CVE-2025-8732

  • libxml2 Ubuntu 22.04 LTS 2.9.13+dfsg-1ubuntu0.11
  • libxml2 Ubuntu 24.04 LTS 2.9.14+dfsg-1.3ubuntu3.7
  • libxml2 Ubuntu 25.10 2.14.5+dfsg-0.2ubuntu0.1
  • libxml2 Ubuntu Pro 14.04 LTS 2.9.1+dfsg1-3ubuntu4.13+esm11
  • libxml2 Ubuntu Pro 16.04 LTS 2.9.3+dfsg1-1ubuntu0.7+esm12
  • libxml2 Ubuntu Pro 18.04 LTS 2.9.4+dfsg1-6.1ubuntu1.9+esm7
  • libxml2 Ubuntu Pro 20.04 LTS 2.9.10+dfsg-5ubuntu0.20.04.10+esm4

ubuntu advisories UBUNTU-CVE-2025-8732

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libxml2 Linux Micro 6.0 2.11.6-12.1
  • libxslt Linux Micro 6.0 1.1.38-8.1
  • libxml2-python Linux Micro 6.0 2.11.6-12.1
  • libxml2 Linux Micro 6.1 2.11.6-slfo.1.1_8.1
  • libxslt Linux Micro 6.1 1.1.38-slfo.1.1_6.1
  • libxml2-python Linux Micro 6.1 2.11.6-slfo.1.1_8.1
  • libxslt SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.1.43-160000.4.1
  • libxml2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.13.8-160000.4.1

suse advisories SUSE-SU-2026:20707-1SUSE-SU-2026:20657-1SUSE-SU-2026:20631-1SUSE-SU-2026:20647-1SUSE-SU-2026:0605-1SUSE-SU-2026:0570-1

  • libxslt openSUSE Leap 16.0 1.1.43-160000.4.1
  • libxml2 openSUSE Leap 16.0 2.13.8-160000.4.1
  • libxml2-python openSUSE Leap 16.0 2.13.8-160000.4.1
  • libxml2 openSUSE Tumbleweed 2.14.5-4.1

opensuse advisories openSUSE-SU-2026:20312-1openSUSE-SU-2026:10213-1

  • libxml2 CBL-Mariner 2.0 2.10.4-11
  • libxml2 Azure Linux 3.0 2.11.5-9

azure linux advisories AZL-66204AZL-66224

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-8732 updated cvss 3.3

libxml2: libxml2: Uncontrolled Recursion Vulnerability

  • Red Hat Enterprise Linux 6 libxml2, libxml2-python Red Hat Enterprise Linux 7 libxml2, libxml2-python Red Hat Enterprise Linux 8 libxml2, python3-libxml2 Red Hat Enterprise Linux 9 libxml2, python3-libxml2 Red Hat Enterprise Linux 10 libxml2 Red Hat JBoss Core Services libxml2
    +1 more products
    Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • drive.google.com https://drive.google.com/file/d/1woIeYVcSQB_NwfEhaVnX6MedpWJ_nqWl/view?usp=drive_link referenced PoC, tagged "exploit" by a source, unverified
  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/libxml2/-/issues/958 referenced PoC, tagged "exploit" by a source, unverified
  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/libxml2/-/issues/958#note_2505853 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CNA 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
CNA 3.0 3.3 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:C
CNA 4.0 1.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CNA 2.0 1.7 AV:L/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • n/a libxml2
  • Siemens RUGGEDCOM RST2428P

Classification

Weakness
  • CWE-674 Uncontrolled Recursion
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.