AIOHTTP: Unread Compressed Request Bodies Bypass client_max_size During Cleanup_CVE-2026-54278

{
    "lastseen": "",
    "description": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS (a zip bomb edge case). This vulnerability is fixed in 3.14.1.",
    "published": "2026-06-22T16:38:38.838Z",
    "modified": "2026-06-22T16:38:38.838Z",
    "type": "cve",
    "title": "AIOHTTP: Unread Compressed Request Bodies Bypass client_max_size During Cleanup",
    "source": "GitHub_M",
    "references": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74\nhttps://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232",
    "id": "CVE-2026-54278",
    "bulletinFamily": "",
    "cwe": [
        "CWE-409"
    ],
    "cvelist": null,
    "sourceData": "aio-libs aiohttp < 3.14.1",
    "sourceHref": "",
    "cvss": {
        "score": 6.6,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "aiohttp",
    "version": "< 3.14.1",
    "vendor": "aio-libs",
    "ai_description": "",
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    "ai_score": 0
}