High 7.1Published Oct 16, 2026

CVE-2026-57488pupnp: Integer truncation in HTTP Content-Length parsing enables request smuggling

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects pupnp and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.33%, higher than 26% of scored CVEs.

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Exploited in the last 30 days

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.2, raw_to_int in upnp/src/genlib/net/http/httpparser.c parses Content-Length with strtol and casts the resulting long to a 32-bit int before the caller stores it as unsigned int. On LP64 systems, values greater than INT_MAX can truncate or wrap, so the HTTP parser can accept a body length different from the declared value. A remote adjacent-network peer can use the resulting parser disagreement to leave bytes to be interpreted as another request in persistent or proxied contexts, or can make a worker wait for an extremely large body and cause denial of service. This issue is fixed in 2.0.2.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness (CWE): CWE-190, CWE-444
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.33% (percentile 26)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

pupnp pupnp pupnp:pupnp (from the name)	before 2.0.2	CNA record
pupnp_project pupnp pupnp_project:pupnp	before 2.0.2	NVD

References

References

https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/pupnp/pupnp/commit/de9602aef34ff722f3630d66c9be8eaa0aa9f012	x-refsource-misc, patch
https://github.com/pupnp/pupnp/releases/tag/release-2.0.2	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.