CVE-2026-5720

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Source
https://cve.org/CVERecord?id=CVE-2026-5720
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5720.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5720
Downstream
Published
2026-04-17T21:39:54.818Z
Modified
2026-08-12T16:41:31.808992Z
Severity
  • 7.1 (High) CVSS_V4 - 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 CVSS Calculator
Summary
miniupnpd Integer Underflow SOAPAction Header Parsing
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.

Database specific 
{
    "cwe_ids": [
        "CWE-125",
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5720.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/miniupnp/miniupnp

Affected ranges

Type
GIT
Repo
https://github.com/miniupnp/miniupnp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b5e5d2eb069822b7f00d56c8e61033b9d500e60c
Fixed
f56bd09b2f2650126b832c5f30a65a09e28167fa
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:miniupnp_project:miniupnpd:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.3.10"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

Other
minissdpd_1_2
minissdpd_1_4
minissdpd_1_6_0
miniupnpc_1_7
miniupnpc_1_8
miniupnpc_1_9
miniupnpc_2_1
miniupnpc_2_2_0
miniupnpc_2_2_1
miniupnpc_2_2_2
miniupnpc_2_2_3
miniupnpc_2_2_4
miniupnpc_2_2_5
miniupnpc_2_2_6
miniupnpc_2_2_7
miniupnpc_2_2_8
miniupnpc_2_2_8_test
miniupnpc_2_2_8_test2
miniupnpc_2_3_0
miniupnpc_2_3_1
miniupnpc_2_3_2
miniupnpc_2_3_3
miniupnpd_1_7
miniupnpd_1_8
miniupnpd_2_1
miniupnpd_2_2_0
miniupnpd_2_2_1
miniupnpd_2_2_2
miniupnpd_2_2_3
miniupnpd_2_3_0
miniupnpd_2_3_1
miniupnpd_2_3_2
miniupnpd_2_3_3
miniupnpd_2_3_4
miniupnpd_2_3_5
miniupnpd_2_3_6
miniupnpd_2_3_7
miniupnpd_2_3_8
miniupnpd_2_3_9

Database specific

vanir_signatures 
[
    {
        "target": {
            "function": "ParseHttpHeaders",
            "file": "miniupnpd/upnphttp.c"
        },
        "id": "CVE-2026-5720-78173e0c",
        "signature_type": "Function",
        "digest": {
            "function_hash": "137835554319908672513060423669875536045",
            "length": 3739.0
        },
        "signature_version": "v1",
        "source": "https://github.com/miniupnp/miniupnp/commit/f56bd09b2f2650126b832c5f30a65a09e28167fa",
        "deprecated": false
    },
    {
        "target": {
            "file": "miniupnpd/upnphttp.c"
        },
        "id": "CVE-2026-5720-d5b78c08",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "45283987207158182963117741176375037749",
                "180580750037951827598248409871921406777",
                "158128436897221582977905386953412345060",
                "193993139606528909609573258168442797661",
                "101451958385939609231602228531813564397",
                "221106545120607036307828017346654385540"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/miniupnp/miniupnp/commit/f56bd09b2f2650126b832c5f30a65a09e28167fa",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-12T16:41:31Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5720.json"