Security readout for executives and security teams
Plain-English summary
This is a low-severity stability flaw in libxslt, a library used to process XSLT stylesheets. A specially formed stylesheet can trigger type confusion during parsing, potentially causing crashes. The cited scoring indicates high attack complexity and required user interaction, with availability impact only.
Executive priority
Treat as routine patch management unless the organization processes untrusted XSLT/XML in business-critical services. Prioritize affected internet-facing or multi-tenant parsing workflows, but this does not currently justify emergency response based on the supplied evidence.
Technical view
The flaw is in libxslt exsltFuncResultComp(), which handles EXSLT func:result elements during stylesheet parsing. Improper type handling may treat an XML document node as an XML element node, causing type confusion, unexpected memory reads, and potential crashes. CVSS 3.1 is 3.1: AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L.
Likely exposure
Exposure is most relevant where applications process untrusted or externally supplied XSLT/XML through libxslt. The bundle identifies affected Red Hat Enterprise Linux 7, 8, 9, 10, OpenShift Container Platform 4 RHCOS, and Red Hat Hardened Images; RHEL 6 status is unknown.
Exploitation context
The source bundle does not show KEV listing or active exploitation. Exploitation is described as difficult and would likely require a target to process attacker-influenced stylesheet content. Expected impact is application instability or denial of service, not confidentiality or integrity compromise.
Researcher notes
Focus assessment on stylesheet parsing paths and EXSLT func:result handling. The bundle supports denial-of-service concern through crashes and memory reads, but not code execution, data theft, public exploit availability, or active exploitation.
Mitigation direction
- Check Red Hat advisory RHSA-2026:11015 for fixed package guidance.
- Update affected libxslt packages through vendor-supported channels where fixes are available.
- Restrict processing of untrusted XSLT stylesheets where business workflows permit.
- Monitor vendor advisories for upstream libxslt and distribution-specific status changes.
Validation and detection
- Inventory systems, containers, and images containing libxslt or libxslt-main.
- Compare installed package versions against Red Hat CVE and errata status.
- Identify applications that accept user-supplied XML or XSLT input.
- Review crash logs for libxslt-related parser failures in exposed services.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-843: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-11731 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L1.61.4redhatVulnerability scoring details
Base CVSS 3.1 score
3.1LowVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Made public.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:11015CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-11731CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2403688CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/libxslt/-/issues/151CVE reference, redhat
- https://gitlab.gnome.org/GNOME/libxslt/-/merge_requests/78CVE reference, redhat
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Access of Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.