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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57488
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 16:18:44 UTC
Updated2026-10-16 20:17:23 UTC
Descriptionpupnp 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pupnp Pupnp affected < 2.0.2 Not specified

References

ReferenceSourceLinkTags
github.com/pupnp/pupnp/releases/tag/release-2.0.2 [email protected] github.com
github.com/pupnp/pupnp/commit/de9602aef34ff722f3630d66c9be8eaa0aa9f012 [email protected] github.com
github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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