Denial-of-Service Flaw in libxml2's RelaxNG Parser
CVE-2026-0989
3.7LOW
Key Information:
- Vendor
Red Hat
- Status
- Vendor
- CVE Published:
- 15 January 2026
What is CVE-2026-0989?
A flaw in the RelaxNG parser of libxml2 pertains to improper handling of external schema inclusions. The parser lacks limitations on the depth of inclusion when processing nested directives. This can lead to excessive recursion in scenarios involving specially crafted schemas, resulting in stack exhaustion and application crashes. Consequently, this poses a denial-of-service risk, affecting applications reliant on libxml2 for XML parsing.
Affected Version(s)
Red Hat Hardened Images 2.15.2-0.3.hum1
References
CVSS V3.1
Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved
Credit
Red Hat would like to thank lanbigking for reporting this issue.