CVE-2026-0989
Published: January 16, 2026Last modified: February 11, 2026
Description
A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.7 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libxml2 | Fixed (2.10.4-r9) |
| 25 LTS | libxml2 | Fixed (2.13.9-r3) | |
| Stream | libxml2 | Fixed (2.13.9-r3) | |
| Hardened Containers | 23 LTS | libxml2 | Fixed (2.10.4-r9) |
| 25 LTS | libxml2 | Fixed (2.13.9-r3) | |
| Stream | libxml2 | Fixed (2.13.9-r3) |