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CVE-2026-55862

6.5 · MEDIUM

pupnp is an SDK for development of UPnP device and control point applications.

Published Oct 16, 2026pupnp_projectCWE-674EPSS 0.46%

Overview

CVE-2026-55862 is a medium-severity vulnerability affecting pupnp_project pupnp. It was published on October 16, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from pupnp_project. Update pupnp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
pupnp_projectpupnp>= 0, < 2.0.0Affected

References

GitHubgithub.com/pupnp/pupnp/commit/82ccaec7ab6b1258ea1ac66374d8940712ccd4c4GitHubgithub.com/pupnp/pupnp/releases/tag/release-2.0.0GitHubgithub.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247GitHubgithub.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55862?

CVE-2026-55862 is a medium-severity vulnerability affecting pupnp_project pupnp. It was published on October 16, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-55862?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-55862?

Check the references section for vendor advisories and patches from pupnp_project. Update pupnp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55862?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55862 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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