Inconsistent interpretation of HTTP requests in PUPnP - #VU134842
Published: June 18, 2026
Vulnerability identifier: #VU134842
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-444
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: pupnp
Affected software:
PUPnP
PUPnP
Detailed vulnerability description
The vulnerability allows a remote attacker to smuggle HTTP requests.
The vulnerability exists due to integer truncation in HTTP Content-Length parsing in raw_to_int() in httpparser.c when handling crafted Content-Length headers. A remote attacker can send a specially crafted HTTP request to smuggle HTTP requests.
Only 64-bit platforms where sizeof(long) is greater than sizeof(int) are affected.
Remediation
Install security update from vendor's website.