miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Mon, 11 May 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:miniupnp_project:miniupnpd:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}


Mon, 04 May 2026 22:30:00 +0000


Mon, 04 May 2026 21:45:00 +0000


Mon, 20 Apr 2026 17:30:00 +0000


Mon, 20 Apr 2026 17:15:00 +0000


Mon, 20 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 17 Apr 2026 23:30:00 +0000

Type Values Removed Values Added
First Time appeared Miniupnp Project
Miniupnp Project miniupnpd
Vendors & Products Miniupnp Project
Miniupnp Project miniupnpd

Fri, 17 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
Description miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.
Title miniupnpd Integer Underflow SOAPAction Header Parsing
Weaknesses CWE-125
CWE-191
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-04T21:40:40.859Z

Reserved: 2026-04-06T20:18:57.634Z

Link: CVE-2026-5720

cve-icon Vulnrichment

Updated: 2026-04-20T14:51:39.399Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-17T22:16:33.803

Modified: 2026-05-11T20:05:20.820

Link: CVE-2026-5720

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-18T09:00:05Z

Weaknesses