CVE-2026-57486

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.2, ixmlNode_compare in ixml/src/node.c passes the nullable nodeValue, namespaceURI, prefix, and localName fields directly to strcmp. Non-namespaced attributes created by ixmlDocument_createAttribute legitimately leave those fields NULL. When ixmlElement_removeAttributeNode compares two distinct attribute objects with the same nodeName through find_condition_node, the pointer-identity shortcut does not apply and the comparison dereferences NULL, causing a process crash when application handling of attacker-controlled XML reaches this path. This issue is fixed in 2.0.2.

• CWE-476

• https://github.com/pupnp/pupnp/commit/4b2f775e3b98de3cfb096707bcde040c5562d9ecPatch
• https://github.com/pupnp/pupnp/releases/tag/release-2.0.2Release Notes
• https://github.com/pupnp/pupnp/security/advisories/GHSA-q54q-vx78-v9rqExploit, Mitigation, Vendor Advisory
• https://github.com/pupnp/pupnp/security/advisories/GHSA-q54q-vx78-v9rqExploit, Mitigation, Vendor Advisory

Published

Oct 16, 2026

Last Modified

Oct 23, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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