CVE-2026-55862: pupnp_project pupnp

CVSS 6.5 (medium) · published 2026-10-16

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.

Affected products (NVD): pupnp_project pupnp

Fixed in (NVD): 2.0.0

Weakness: CWE-674

Source: NVD CVE-2026-55862

References

• https://github.com/pupnp/pupnp/commit/82ccaec7ab6b1258ea1ac66374d8940712ccd4c4
• https://github.com/pupnp/pupnp/releases/tag/release-2.0.0
• https://github.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247
• https://github.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247

Check your software

Connect an AI agent to the Fixlane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.