{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53524",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-09T17:30:33.456Z",
        "datePublished": "2026-08-21T22:18:23.432Z",
        "dateUpdated": "2026-08-21T22:18:23.432Z"
    },
    "containers": {
        "cna": {
            "title": "WeeChat has a Decompression Bomb in Relay WebSocket (DoS)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-409",
                            "lang": "en",
                            "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/weechat/weechat/security/advisories/GHSA-v2v4-45wm-5cr3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/weechat/weechat/security/advisories/GHSA-v2v4-45wm-5cr3"
                }
            ],
            "affected": [
                {
                    "vendor": "weechat",
                    "product": "weechat",
                    "versions": [
                        {
                            "version": ">= 4.3.0, < 4.9.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-21T22:18:23.432Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "WeeChat (Wee Enhanced Environment for Chat) is a free chat client. In versions 4.3.0 through 4.9.0, the WeeChat relay module's WebSocket permessage-deflate decompression function relay_websocket_inflate() has no upper bound on output size. An authenticated relay user can send a small compressed WebSocket frame (~100 bytes) that decompresses to gigabytes, exhausting all server memory and crashing the entire WeeChat process. The api protocol enables permessage-deflate and requires authentication before WebSocket upgrade. Version 4.9.1 patches the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-v2v4-45wm-5cr3",
                "discovery": "UNKNOWN"
            }
        }
    }
}