PYSEC-2026-2111
Vulnerability from pysec - Published: 2026-06-22 18:16 - Updated: 2026-07-13 05:47
VLAI
Details
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.
Severity
7.5 (High)
Impacted products
| Name | purl | aiohttp | pkg:pypi/aiohttp |
|---|
Aliases
{
"affected": [
{
"ecosystem_specific": {},
"package": {
"ecosystem": "PyPI",
"name": "aiohttp",
"purl": "pkg:pypi/aiohttp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1",
"0.10.0",
"0.10.1",
"0.10.2",
"0.11.0",
"0.12.0",
"0.13.0",
"0.13.1",
"0.14.0",
"0.14.1",
"0.14.2",
"0.14.3",
"0.14.4",
"0.15.0",
"0.15.1",
"0.15.2",
"0.15.3",
"0.16.0",
"0.16.1",
"0.16.2",
"0.16.3",
"0.16.4",
"0.16.5",
"0.16.6",
"0.17.0",
"0.17.1",
"0.17.2",
"0.17.3",
"0.17.4",
"0.18.0",
"0.18.1",
"0.18.2",
"0.18.3",
"0.18.4",
"0.19.0",
"0.2",
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"0.20.1",
"0.20.2",
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"0.21.1",
"0.21.2",
"0.21.4",
"0.21.5",
"0.21.6",
"0.22.0",
"0.22.0a0",
"0.22.0b0",
"0.22.0b1",
"0.22.0b2",
"0.22.0b3",
"0.22.0b4",
"0.22.0b5",
"0.22.0b6",
"0.22.1",
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"0.22.3",
"0.22.4",
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"0.3",
"0.4",
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"0.7.3",
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"0.8.3",
"0.8.4",
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"1.2.0",
"1.3.0",
"1.3.1",
"1.3.2",
"1.3.3",
"1.3.4",
"1.3.5",
"2.0.0",
"2.0.0rc1",
"2.0.1",
"2.0.2",
"2.0.3",
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"2.0.5",
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"2.2.5",
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"2.3.1",
"2.3.10",
"2.3.1a1",
"2.3.2",
"2.3.2b2",
"2.3.2b3",
"2.3.3",
"2.3.4",
"2.3.5",
"2.3.6",
"2.3.7",
"2.3.8",
"2.3.9",
"3.0.0",
"3.0.0b0",
"3.0.0b1",
"3.0.0b2",
"3.0.0b3",
"3.0.0b4",
"3.0.1",
"3.0.2",
"3.0.3",
"3.0.4",
"3.0.5",
"3.0.6",
"3.0.7",
"3.0.8",
"3.0.9",
"3.1.0",
"3.1.1",
"3.1.2",
"3.1.3",
"3.10.0",
"3.10.0b1",
"3.10.0rc0",
"3.10.1",
"3.10.10",
"3.10.11",
"3.10.11rc0",
"3.10.2",
"3.10.3",
"3.10.4",
"3.10.5",
"3.10.6",
"3.10.6rc0",
"3.10.6rc1",
"3.10.6rc2",
"3.10.7",
"3.10.8",
"3.10.9",
"3.11.0",
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"3.11.0b1",
"3.11.0b2",
"3.11.0b3",
"3.11.0b4",
"3.11.0b5",
"3.11.0rc0",
"3.11.0rc1",
"3.11.0rc2",
"3.11.1",
"3.11.10",
"3.11.11",
"3.11.12",
"3.11.13",
"3.11.14",
"3.11.15",
"3.11.16",
"3.11.17",
"3.11.18",
"3.11.2",
"3.11.3",
"3.11.4",
"3.11.5",
"3.11.6",
"3.11.7",
"3.11.8",
"3.11.9",
"3.12.0",
"3.12.0b0",
"3.12.0b1",
"3.12.0b2",
"3.12.0b3",
"3.12.0rc0",
"3.12.0rc1",
"3.12.1",
"3.12.10",
"3.12.11",
"3.12.12",
"3.12.13",
"3.12.14",
"3.12.15",
"3.12.1rc0",
"3.12.2",
"3.12.3",
"3.12.4",
"3.12.6",
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"3.12.7rc0",
"3.12.8",
"3.12.9",
"3.13.0",
"3.13.1",
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"3.13.3",
"3.13.4",
"3.13.5",
"3.14.0",
"3.2.0",
"3.2.1",
"3.3.0",
"3.3.0a0",
"3.3.1",
"3.3.2",
"3.3.2a0",
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"3.4.0a0",
"3.4.0a3",
"3.4.0b1",
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"3.9.4",
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"3.9.5"
]
}
],
"aliases": [
"CVE-2026-54278",
"GHSA-g3cq-j2xw-wf74"
],
"details": "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.",
"id": "PYSEC-2026-2111",
"modified": "2026-07-13T05:47:37.320880Z",
"published": "2026-06-22T18:16:46.393Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74"
},
{
"type": "FIX",
"url": "https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
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