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TI-2026-75352 Aliases CVE-2026-57486

pupnp: NULL pointer dereference in ixmlNode_compare, non-namespaced attributes

Priority HIGH 72CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-476.

Summary

pupnp, an SDK for UPnP device and control point applications, is affected before 2.0.2. The ixmlNode_compare function passes nullable fields directly to strcmp, so comparing two distinct non-namespaced attributes with the same name dereferences a NULL pointer (CWE-476). A remote unauthenticated attacker can crash the process when the application handling attacker-controlled XML reaches the ixmlElement_removeAttributeNode path. A public proof-of-concept exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0041 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed pupnp (pupnp): 2.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pupnppupnpbefore 2.0.22.0.2Patch availableCNA
  • pupnp Vendorpupnp Affected before 2.0.2 Fixed in 2.0.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pupnp_project:pupnp:*:*:*:*:*:*:*:*before 2.0.2Vulnerablepupnp
  • cpe:2.3:a:pupnp_project:pupnp:*:*:*:*:*:*:*:* Versions before 2.0.2 Vulnerable ·pupnp

Remediation

Upgrade pupnp to version 2.0.2, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA pupnp (pupnp) Fixed in 2.0.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-57486
  2. 2026-11-04 Affected versions changed · Red Hat
  3. 2026-11-04 CVSS score added · Red Hat

References

Exploit 1

Patch 1

Other 1

  • TI-2026-75354 pupnp Content-Length integer truncation enables request smuggling CVSS 3.1HIGH 7.1
  • TI-2026-75349 Uncontrolled recursion in pupnp DOM functions causes stack overflow CVSS 3.1MEDIUM 6.5
  • TI-2021-10175 DNS rebinding in pupnp CVSS 3.1CRITICAL 9.8
  • TI-2026-75358 Blocking DNS lookups in pupnp allow denial of service CVSS 3.1HIGH 7.5
  • TI-2026-75353 Chunked HTTP bodies in libupnp bypass the size limit CVSS 3.1HIGH 7.5
  • TI-2021-09467 A stack overflow in pupnp before version 1.14.5 can cause the denial of service through… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences