Search threats, CVEs… ⌘K
Back to vendor advisories
Ubuntu Security NoticesUSN-8872-1

USN-8872-1: libxmltok vulnerabilities

It was discovered that Expat, contained with the xmltok library did not correctly handle certain integer arithmetic. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly cause a denial of service. (CVE-2026-56404, CVE-2026-56405)

Read the vendor bulletin
Not listedCVSS not listedNot listed severity
Scope

What the vendor says is affected

The collected bulletin did not provide a separate affected-products list. Check the original bulletin before making an exposure decision.

Timeline

When this advisory changed

  1. Published by Ubuntu

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-56404View CVSS, KEV, EPSS, and threat contextCVE-2026-56405View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor