Vulnerability details

CVE-2026-57488

pupnp pupnp

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

CVSS 3.1

7.1High

Official description

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 scores

Score	Version	Source	Vector
7.1High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H`

Affected products

Vendor	Product	Versions	Source
pupnp	pupnp	< 2.0.2	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/pupnp/pupnp/commit/de9602aef34ff722f3630d66c9be8eaa0aa9f012 x_refsource_MISC
https://github.com/pupnp/pupnp/releases/tag/release-2.0.2 x_refsource_MISC
https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g x_refsource_CONFIRM

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Details

Published: 2026-10-16
Last updated: 2026-10-16
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.33%

Probability of exploitation in 30 days

26.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-190
Integer Overflow or Wraparound
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')