miniupnpd Integer Underflow SOAPAction Header Parsing_CVE-2026-5720

7.1 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-5720

Source VulnCheck

Published Apr 17, 2026 at 21:39

Affected Product

Vendor miniupnp project

Product miniupnpd

Affected Versions miniupnp project miniupnpd 0

CWE Classification

CWE-191 CWE-125

References

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    "published": "2026-04-17T21:39:54.818Z",
    "modified": "2026-04-17T21:39:54.818Z",
    "type": "cve",
    "title": "miniupnpd Integer Underflow SOAPAction Header Parsing",
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    "references": "https://github.com/miniupnp/miniupnp/\nhttps://github.com/miniupnp/miniupnp/commit/a0ee71e9fa66b60052bb3d2cf84380b79db3f8c8\nhttps://www.vulncheck.com/advisories/miniupnpd-integer-underflow-soapaction-header-parsing",
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