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Libxml2 EUVDEUVD-2026-71823

| CVE-2026-86144 HIGH
Incorrect Resource Transfer Between Spheres (CWE-669)
2026-09-05 mitre GHSA-h6w8-m27h-f268
Denial Of Service SSRF XXE Libxml2
7.8
CVSS 3.1 · NVD
Temporal: 5.6
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Severity by source

Vendor (mitre) PRIMARY
MEDIUM
qualitative
NVD
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CIRCL (temporal)
5.6 MEDIUM
cvss
vuln.today AI
6.5 MEDIUM

AV:N reflects realistic delivery via network-facing XML APIs; AC:H captures the compound prerequisites of XInclude use plus XML_PARSE_NONET reliance; S:C for outbound cross-boundary connections; C/I/A:L for limited SSRF/XXE/DoS impact.

3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:N/SA:N
SUSE
5.6 MEDIUM
AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Red Hat
5.6 MEDIUM
qualitative

Primary rating from Vendor (mitre).

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

8
Analysis Updated
Sep 15, 2026 - 19:27 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 15, 2026 - 19:22 vuln.today
cvss_changed
Severity Changed
Sep 15, 2026 - 19:22 NVD
MEDIUM HIGH
CVSS changed
Sep 15, 2026 - 19:22 NVD
5.6 (MEDIUM) 7.8 (HIGH)
Patch available
Sep 05, 2026 - 06:01 EUVD
Source Code Evidence Fetched
Sep 05, 2026 - 05:15 vuln.today
Analysis Generated
Sep 05, 2026 - 05:15 vuln.today
CVE Published
Sep 05, 2026 - 04:34 cve.org
MEDIUM 5.6

DescriptionNVD

In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).

AnalysisAI

SSRF, XXE and denial of service exposure arise in libxml2 before 2.15.4 because xmlXIncludeProcess and xmlXIncludeProcessTree fail to propagate the document's parseFlags down to the parser contexts they create for XInclude resolution. When parseFlags are dropped, protective options such as XML_PARSE_NONET stop being enforced, so an attacker-supplied document containing an external xi:include href can force outbound network fetches through the application's resource loader — enabling server-side request forgery, external entity injection, or a hang driven by an intentionally slow remote resource. …

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Micro 5.3 Not-Affected
SUSE Linux Enterprise Micro 5.4 Not-Affected
SUSE Linux Enterprise Micro 5.5 Not-Affected

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EUVD-2026-71823 vulnerability details – vuln.today
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