CVE-2025-55763

Buffer Overflow in the URI parser of CivetWeb 1.14 through 1.16 (latest) allows a remote attacker to achieve remote code execution via a crafted HTTP request. This vulnerability is triggered during request processing and may allow an attacker to corrupt heap memory, potentially leading to denial of service or arbitrary code execution.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55763.json",
    "cna_assigner": "mitre"
}

References

Affected packages

Git / github.com/civetweb/civetweb

Affected ranges

Type

GIT

Repo

https://github.com/civetweb/civetweb

Events

Introduced

c1d08d3c35bc939da7bec09973bda77c702c1d00

Fixed

d7ba35bbb649209c66e582d5a0244ba988a15159

Database specific

Show details

{
    "cpe": "cpe:2.3:a:civetweb_project:civetweb:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.14"
        },
        {
            "fixed": "1.16"
        },
        {
            "last_affected": "1.16"
        }
    ],
    "source": [
        "DESCRIPTION",
        "CPE_RANGE"
    ]
}

Affected versions

v1.*

v1.14

v1.15

Database specific

vanir_signatures_modified

"2026-08-12T15:14:09Z"

vanir_signatures

[
    {
        "id": "CVE-2025-55763-5eb3e7d7",
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "length": 23217.0,
            "function_hash": "236986066512914156358172579350936628310"
        },
        "source": "https://github.com/civetweb/civetweb/commit/d7ba35bbb649209c66e582d5a0244ba988a15159",
        "target": {
            "function": "START_TEST",
            "file": "unittest/public_server.c"
        }
    },
    {
        "id": "CVE-2025-55763-d824d1f6",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "153589748205355842810938074677543536564",
                "64347685013219554478259096366411100607",
                "42582433767714228854703617330205664163",
                "111675856369252008400048137228803108085",
                "275127777792615253363883918877750296299",
                "325948444275312414874240326871799484553"
            ]
        },
        "source": "https://github.com/civetweb/civetweb/commit/d7ba35bbb649209c66e582d5a0244ba988a15159",
        "target": {
            "file": "unittest/public_server.c"
        }
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-55763.json"