CVE-2026-0989— Libxml2: unbounded relaxng include recursion leading to stack overflow
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-0989
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Libxml2: unbounded relaxng include recursion leading to stack overflow
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
libxml2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libxml2是GNOME开源的一个用来解析XML文档的函数库。它用C语言写成，并且能为多种语言所调用，例如C语言，C++，XSH。 libxml2存在安全漏洞，该漏洞源于RelaxNG解析器在处理外部模式包含时未对包含深度进行限制，可能导致解析特制或过于复杂的模式时造成堆栈耗尽和应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images | 2.15.2-0.3.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Enterprise Linux 10 | - | cpe:/o:redhat:enterprise_linux:10 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | - | cpe:/o:redhat:enterprise_linux:8 | |
| Red Hat | Red Hat Enterprise Linux 9 | - | cpe:/o:redhat:enterprise_linux:9 | |
| Red Hat | Red Hat JBoss Core Services | - | cpe:/a:redhat:jboss_core_services:1 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2026-0989
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-0989
请登录查看更多情报信息。
- 2429933 – (CVE-2026-0989) CVE-2026-0989 libxml2: Unbounded RelaxNG Include Recursion Leading to Stack Overflowissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-0989
Same Patch Batch · Red Hat · 2026-01-15 · 4 CVEs total
| CVE-2026-0990 | 5.9 MEDIUM | Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing |
| CVE-2026-0976 | 3.7 LOW | Org.keycloak/keycloak-quarkus-server: keycloak: proxy bypass due to improper handling of m |
| CVE-2026-0992 | 2.9 LOW | Libxml2: libxml2: denial of service via crafted xml catalogs |
IV. Related Vulnerabilities
Same product: Red Hat Hardened Images
- CVE-2026-33846
Gnutls: gnutls: denial of service via heap buffer overflow i - CVE-2026-6732
Libxml2: libxml2: denial of service via crafted xsd-validate - CVE-2026-1584
Gnutls: gnutls: remote denial of service via crafted clienth - CVE-2025-14821
Libssh: libssh: insecure default configuration leads to loca - CVE-2026-5745
Libarchive: a null pointer dereference vulnerability exists
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-674
V. Comments for CVE-2026-0989
No comments yet