Is CVE-2026-55862 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-55862 being exploited in the wild.

How severe is CVE-2026-55862?

Medium severity, with a CVSS score of 6.5, published 16 October 2026.

Is there a fix for CVE-2026-55862?

Yes: fixed in 2.0.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-55862 attacked?

It is attacked over the network or from the adjacent network.

Am I affected by CVE-2026-55862?

Check whether you run Pupnp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-55862: pupnp recursive XML parsing stack overflow

CVE-2026-55862 · Severity: medium · CVSS 6.5 · Published 2026-10-16

pupnp is a software development kit for building UPnP devices and applications that communicate across networks. An attacker on the local network can send a specially crafted XML document with excessive nesting through a SOAP request to crash the UPnP service, causing a denial of service. This is an incomplete fix for a prior vulnerability that left multiple XML traversal functions vulnerable to stack exhaustion.

Technologies: Pupnp. Vendors: Pupnp.

Quick answers

Is CVE-2026-55862 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-55862 being exploited in the wild.
How severe is CVE-2026-55862?: Medium severity, with a CVSS score of 6.5, published 16 October 2026.
Which products and versions are affected?: Pupnp before 2.0.0.
Is there a fix for CVE-2026-55862?: Yes: fixed in 2.0.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55862 attacked?: It is attacked over the network or from the adjacent network.
Am I affected by CVE-2026-55862?: Check whether you run Pupnp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.0.0

Technical details

The vulnerability exists in multiple ixml DOM traversal functions (ixmlPrintDomTreeRecursive, ixmlNode_getElementsByTagNameRecursive, ixmlNode_getElementsByTagNameNSRecursive, ixmlNode_cloneNodeTreeRecursive, and ixmlNode_isAncestor) that recursively process firstChild and nextSibling links without bounds. An unauthenticated peer on the local network can supply deeply nested XML via SOAP to exhaust a service thread's stack and trigger a crash. The fix converts all five functions from recursive to iterative using fence-based traversal patterns.

Affected products

pupnp pupnp before 2.0.0

Timeline

2026-10-16: disclosed
2026-06-15: patched

References

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