What is CVE-2026-55862?

CVE-2026-55862 is a medium-severity vulnerability in Pupnp, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-10-16.

How severe is CVE-2026-55862?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Pupnp

CVE-2026-55862

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.0, multiple ixml DOM traversal functions process deeply nested XML with unbounded recursion. The iterative XML parser accepts the document, but ixmlPrintDomTreeRecursive in ixml/src/ixml.c and ixmlNode_getElementsByTagNameRecursive, ixmlNode_getElementsByTagNameNSRecursive, ixmlNode_cloneNodeTreeRecursive, and ixmlNode_isAncestor in ixml/src/node.c recurse over firstChild and nextSibling links. An unauthenticated peer on the local network can supply deeply nested XML through a SOAP request, exhaust a service thread's stack, and crash the UPnP service. This is an incomplete-fix case for CVE-2021-28302 because its remediation converted ixmlNode_free but left these traversal paths recursive. This issue is fixed in 2.0.0.

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Pupnp — versions < 2.0.0

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

Frequently asked questions

What is CVE-2026-55862?: CVE-2026-55862 is a medium-severity vulnerability in Pupnp, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-10-16.
How severe is CVE-2026-55862?: Medium severity. CVSS v3 base score is 6.5 out of 10.