# Xmlsoft vulnerabilities

Source: https://junglewise.ai/threats/vendors/xmlsoft  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/xmlsoft.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 10 vulnerabilities in Xmlsoft: 0 in the last 7 days and 8 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-86144, was published on 5 September 2026. Nothing was published in the last eight weeks. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 8
- All time: 10 (0 critical, 0 exploited in the wild)

## About Xmlsoft

The organization responsible for the development and maintenance of the libxml2 and libxslt C libraries.

## Latest Xmlsoft vulnerabilities

- [CVE-2026-86144: libxml2 xinclude parseFlags not propagated](https://junglewise.ai/threats/cve-2026-86144-libxml2-xinclude-parseflags-not-propagated) (medium, CVSS 5.6, published 5 Sep 2026)
- [CVE-2026-86143: libxml2 integer overflow in xmlOutputWriteCallback](https://junglewise.ai/threats/cve-2026-86143-libxml2-integer-overflow-in-xmloutputwritecallback) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86142: libxml2 heap buffer overflow in xmlXPtrEvalXPtrPart](https://junglewise.ai/threats/cve-2026-86142-libxml2-heap-buffer-overflow-in-xmlxptrevalxptrpart) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86141: libxml2 NULL pointer dereference in xmlRegNewParserCtxt](https://junglewise.ai/threats/cve-2026-86141-libxml2-null-pointer-dereference-in-xmlregnewparserctxt) (low, CVSS 2.9, published 5 Sep 2026)
- [CVE-2026-86140: libxml2 stack-based buffer overflow in xmlSnprintfElements](https://junglewise.ai/threats/cve-2026-86140-libxml2-stack-based-buffer-overflow-in-xmlsnprintfelements) (high, CVSS 8, published 5 Sep 2026)
- [CVE-2026-86139: libxml2 integer overflow in xmlURIEscapeStr](https://junglewise.ai/threats/cve-2026-86139-libxml2-integer-overflow-in-xmluriescapestr) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86138: libxml2 integer overflow and heap buffer overflow in xmlDictAddQString](https://junglewise.ai/threats/cve-2026-86138-libxml2-integer-overflow-and-heap-buffer-overflow-in) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86137: libxml2 out-of-bounds read in xmlregexp NXT macro](https://junglewise.ai/threats/cve-2026-86137-libxml2-out-of-bounds-read-in-xmlregexp-nxt-macro) (low, CVSS 2.9, published 5 Sep 2026)
- [CVE-2026-11979: xmlsoft libxml2 stack buffer overflow in xmlcatalog shell](https://junglewise.ai/threats/cve-2026-11979-xmlsoft-libxml2-stack-buffer-overflow-in-xmlcatalog-shell) (info, CVSS 1.8, published 29 Jun 2026)
- [CVE-2025-9714: GNOME libxml2 stack overflow in XPath evaluation](https://junglewise.ai/threats/cve-2025-9714-gnome-libxml2-stack-overflow-in-xpath-evaluation) (medium, CVSS 6.2, published 10 Sep 2025)

## Most severe Xmlsoft vulnerabilities

- [CVE-2026-86140: libxml2 stack-based buffer overflow in xmlSnprintfElements](https://junglewise.ai/threats/cve-2026-86140-libxml2-stack-based-buffer-overflow-in-xmlsnprintfelements) (high, CVSS 8, published 5 Sep 2026)
- [CVE-2026-86142: libxml2 heap buffer overflow in xmlXPtrEvalXPtrPart](https://junglewise.ai/threats/cve-2026-86142-libxml2-heap-buffer-overflow-in-xmlxptrevalxptrpart) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86143: libxml2 integer overflow in xmlOutputWriteCallback](https://junglewise.ai/threats/cve-2026-86143-libxml2-integer-overflow-in-xmloutputwritecallback) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86138: libxml2 integer overflow and heap buffer overflow in xmlDictAddQString](https://junglewise.ai/threats/cve-2026-86138-libxml2-integer-overflow-and-heap-buffer-overflow-in) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2026-86139: libxml2 integer overflow in xmlURIEscapeStr](https://junglewise.ai/threats/cve-2026-86139-libxml2-integer-overflow-in-xmluriescapestr) (medium, CVSS 6.9, published 5 Sep 2026)
- [CVE-2025-9714: GNOME libxml2 stack overflow in XPath evaluation](https://junglewise.ai/threats/cve-2025-9714-gnome-libxml2-stack-overflow-in-xpath-evaluation) (medium, CVSS 6.2, published 10 Sep 2025)
- [CVE-2026-86144: libxml2 xinclude parseFlags not propagated](https://junglewise.ai/threats/cve-2026-86144-libxml2-xinclude-parseflags-not-propagated) (medium, CVSS 5.6, published 5 Sep 2026)
- [CVE-2026-86137: libxml2 out-of-bounds read in xmlregexp NXT macro](https://junglewise.ai/threats/cve-2026-86137-libxml2-out-of-bounds-read-in-xmlregexp-nxt-macro) (low, CVSS 2.9, published 5 Sep 2026)
- [CVE-2026-86141: libxml2 NULL pointer dereference in xmlRegNewParserCtxt](https://junglewise.ai/threats/cve-2026-86141-libxml2-null-pointer-dereference-in-xmlregnewparserctxt) (low, CVSS 2.9, published 5 Sep 2026)
- [CVE-2026-11979: xmlsoft libxml2 stack buffer overflow in xmlcatalog shell](https://junglewise.ai/threats/cve-2026-11979-xmlsoft-libxml2-stack-buffer-overflow-in-xmlcatalog-shell) (info, CVSS 1.8, published 29 Jun 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 8 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Xmlsoft technologies

- [Xmlsoft Libxml2](https://junglewise.ai/threats/technologies/libxml2): 13 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Xmlsoft vulnerabilities", https://junglewise.ai/threats/vendors/xmlsoft, 9 November 2026.