CVE-2026-57486 pupnp: NULL pointer dereference in ixmlNode_compare crashes on non-namespaced attributes
An attacker can cause a denial of service in applications using the pupnp library by sending crafted XML that triggers a null pointer dereference.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57486?
CVE-2026-57486 is a high-severity vulnerability in pupnp, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2026-57486?
It affects 1 product.
Products include Pupnp Project Pupnp.
How do I fix CVE-2026-57486?
Upgrade to a fixed version.
Is CVE-2026-57486 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57486 exists.
Other vulnerabilities in pupnp
- CVE-2021-29462 DNS rebinding in pupnp
- CVE-2026-57487 libupnp chunked HTTP bodies can bypass g_maxContentLength and be fully buffered
- CVE-2026-77630 pupnp: Denial of service via blocking DNS resolution in parse_uri()/GENA callback parsing
- CVE-2021-28302 Denial of service in n/a
- CVE-2026-57488 pupnp: Integer truncation in HTTP Content-Length parsing enables request smuggling
Sources
Also known as DEBIAN-CVE-2026-57486, GHSA-q54q-vx78-v9rq, UBUNTU-CVE-2026-57486.