# DEBIAN-CVE-2026-86144: libxml2 security update

DEBIAN-CVE-2026-86144, released September 11, 2026, fixes 1 CVE in libxml2 (version 2.15.4+dfsg-1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/debian-cve-2026-86144
- Platform: Linux
- Released: Sep 11, 2026
- Priority: High (Closes CVE-2026-86144, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2026-86144

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libxml2](https://patchblox.com/security/data/product/linux/libxml2.md) | Debian 14 | 2.15.4+dfsg-1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-86144](https://patchblox.com/security/data/cve/CVE-2026-86144.md) | High | 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). | 8.5 | 0.0019 |  |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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