Vulnerability-Lookup

GHSA-Q4XV-XMJX-4H94

Vulnerability from github – Published: 2026-04-18 00:31 – Updated: 2026-04-20 18:31

Details

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.

Severity ?

7.1 (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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-5720"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-17T22:16:33Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-q4xv-xmjx-4h94",
  "modified": "2026-04-20T18:31:44Z",
  "published": "2026-04-18T00:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5720"
    },
    {
      "type": "WEB",
      "url": "https://github.com/miniupnp/miniupnp/commit/a0ee71e9fa66b60052bb3d2cf84380b79db3f8c8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/miniupnp/miniupnp/commit/b5e5d2eb069822b7f00d56c8e61033b9d500e60c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/miniupnp/miniupnp"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/miniupnpd-integer-underflow-soapaction-header-parsing"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-5720 (GCVE-0-2026-5720)

Vulnerability from cvelistv5 – Published: 2026-04-17 21:39 – Updated: 2026-04-20 16:59

Title

miniupnpd Integer Underflow SOAPAction Header Parsing

Summary

Severity ?

7.1 (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

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)
CWE-125 - Out-of-bounds Read

Assigner

VulnCheck

References

URL

Tags

	https://github.com/miniupnp/miniupnp/	product
	https://github.com/miniupnp/miniupnp/commit/b5e5d…
	https://www.vulncheck.com/advisories/miniupnpd-in…	third-party-advisory

Impacted products

	Vendor	Product	Version
	miniupnp project	miniupnpd	Affected: 0 , < 2.3.10 (semver)

Date Public ?

2026-04-03 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc.

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-Q4XV-XMJX-4H94

CVE-2026-5720 (GCVE-0-2026-5720)

Tags

Sightings

Nomenclature