SB2026012787 - Multiple vulnerabilities in Libxml2

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Main Vulnerability Database SB2026012787

SB2026012787 - Multiple vulnerabilities in Libxml2

Published: January 27, 2026

Security Bulletin ID SB2026012787
Severity
Medium
Patch available
NO
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2026-0992)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.


2) Uncontrolled Recursion (CVE-ID: CVE-2026-0990)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an uncontrolled recursion in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker can pass specially crafted input to the application and perform a denial of service attack.


3) Uncontrolled Recursion (CVE-ID: CVE-2026-0989)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an uncontrolled recursion in the RelaxNG parser. A remote attacker can pass specially crafted input to the application and perform a denial of service attack.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References