PatchTheCVECVE-2026-86144: In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlag
CVE-2026-86144 is a medium-severity flaw (CVSS 5.6) affecting libxml2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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).
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.6 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 92%) |
| CISA exploited list | No |
| Weakness | CWE-669 |
| Published | 2026-09-05 |
| Last modified | 2026-09-15 |
Last updated 2026-09-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-86144?
libxml2: upgrade to 2.15.4. Exact commands for each OS are on this page.
Is CVE-2026-86144 being exploited?
CVE-2026-86144 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-86144 affect?
CVE-2026-86144 affects libxml2. Severity is medium (CVSS 5.6). 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 i
How urgent is CVE-2026-86144?
Priority 22/100. No elevated risk signals yet.
Software pages
Related CVEs
- CVE-2026-6732 MEDIUM 6.5 UPGRADE MITIGATE A flaw was found in libxml2
- CVE-2026-6653 CRITICAL 9.8 UPGRADE Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote
- CVE-2026-11979 HIGH 7.8 UPGRADE libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --she
- CVE-2026-86137 LOW 2.9 UPGRADE In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the N
- CVE-2026-86138 MEDIUM 6.9 UPGRADE In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer