CVE-2026-0990
5.9
MEDIUM
CVSS 3.1
EPSS 0.76%
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.
How to fix CVE-2026-0990
To remediate CVE-2026-0990, upgrade the affected package to a fixed version below.
- —upgrade to 2.9.10+dfsg-6.7+deb11u10 or later
Is CVE-2026-0990 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.9.10+dfsg-6.7+deb11u10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |