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Fencer Vulns
low 3.1

CVE-2025-11731 json

Libxslt: type confusion in exsltfuncresultcompfunction of libxslt

published 2025-10-14 12 mo ago modified 2026-11-06 3 d ago also EUVD-2025-34140

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT <func:result> elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.

Patch / fix

  • Red Hat Red Hat Hardened Images 1.1.45-0.1.hum1
  • libxslt Debian 14 1.1.43-0.3

debian advisories DEBIAN-CVE-2025-11731

  • libxslt Ubuntu 26.04 LTS 1.1.43-0.3

ubuntu advisories UBUNTU-CVE-2025-11731

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

  • libxslt hummingbird 1 1.1.45-0.1.hum1
  • python3-libxslt hummingbird 1 1.1.45-0.1.hum1

red hat advisories RHSA-2026:11015

  • libxslt SLE Module for Package Hub 15 SP7, SLE Module for Package Hub 15 SP6, SLE Module for Basesystem 15 SP7 +13 more 1.1.34-150400.3.13.1
  • libxslt SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.1.43-160000.3.1
  • libxslt Linux Micro 6.0 1.1.38-7.1
  • libxslt Linux Micro 6.1 1.1.38-slfo.1.1_5.1
  • libxslt SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 1.1.32-150000.3.28.1
  • libxslt-python openSUSE Leap 15.6 1.1.32-150000.3.28.1
  • libxslt SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.1.28-17.21.1

suse advisories SUSE-SU-2026:0603-1SUSE-SU-2025:21008-1SUSE-SU-2025:21031-1SUSE-SU-2025:3875-1SUSE-SU-2025:3778-1SUSE-SU-2025:20892-1

  • python-lxml openSUSE Tumbleweed 6.1.1-1.1
  • libxslt openSUSE Leap 16.0 1.1.43-160000.3.1
  • libxslt openSUSE Tumbleweed 1.1.43-4.1

opensuse advisories openSUSE-SU-2026:11147-1openSUSE-SU-2025:20050-1openSUSE-SU-2025:15641-1

  • libxslt CBL-Mariner 2.0 1.1.34-9
  • libxslt Azure Linux 3.0 1.1.43-3

azure linux advisories AZL-70550AZL-70601

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-2025-11731 updated cvss 3.1

libxslt: Type Confusion in exsltFuncResultCompfunction of libxslt

  • Red Hat Enterprise Linux 6 libxslt, libxslt-python
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 libxslt, libxslt-python Red Hat Enterprise Linux 8 libxslt Red Hat Enterprise Linux 9 libxslt Red Hat Enterprise Linux 10 libxslt Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images libxslt 1.1.45-0.1.hum1, python3-libxslt 1.1.45-0.1.hum1
    fixed: vendor fix RHSA-2026:11015

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
12 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Affected products

  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness
  • CWE-843 Access of Resource Using Incompatible Type

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.