CVE WatchJun 30, 2026

CVE-2026-0990

A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI functio

CVSS

5.9

Medium

EPSS

0.8%

p51

KEV

—

Exploit Today

0-100

Published: Jan 15, 2026 · Last modified: Jun 30, 2026 · CWE-674

EPSS · 30d

0.7%EPSS · 30 days0.8%

2026-06-302026-07-16

Technical description

A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.

Official references

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