UBUNTU-CVE-2026-69244 (CVE-2026-69244)
Vulnerability from osv_ubuntu – Published: 2026-08-03 21:16 – Updated: 2026-08-06 00:23 – Source website
VLAI
Details
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "0.20.2-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@0.20.2-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.17.2-1",
"0.17.4-1",
"0.17.4-1build1",
"0.20.2-1",
"0.20.2-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "3.0.1-1ubuntu0.1~esm7"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@3.0.1-1ubuntu0.1~esm7?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.3-1build1",
"2.2.3-2",
"2.3.6-1",
"3.0.1-1",
"3.0.1-1ubuntu0.1~esm1",
"3.0.1-1ubuntu0.1~esm4",
"3.0.1-1ubuntu0.1~esm5",
"3.0.1-1ubuntu0.1~esm6",
"3.0.1-1ubuntu0.1~esm7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "3.6.2-1ubuntu1+esm6"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@3.6.2-1ubuntu1+esm6?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.4-1",
"3.5.4-1build1",
"3.6.1-1",
"3.6.2-1",
"3.6.2-1build1",
"3.6.2-1ubuntu0.1~esm1",
"3.6.2-1ubuntu1",
"3.6.2-1ubuntu1+esm1",
"3.6.2-1ubuntu1+esm3",
"3.6.2-1ubuntu1+esm4",
"3.6.2-1ubuntu1+esm5",
"3.6.2-1ubuntu1+esm6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "3.8.1-4ubuntu0.2+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@3.8.1-4ubuntu0.2+esm3?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.4-1",
"3.7.4-1build2",
"3.8.1-3",
"3.8.1-4",
"3.8.1-4build1",
"3.8.1-4ubuntu0.2",
"3.8.1-4ubuntu0.2+esm1",
"3.8.1-4ubuntu0.2+esm2",
"3.8.1-4ubuntu0.2+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "3.9.1-1ubuntu0.1+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@3.9.1-1ubuntu0.1+esm3?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.8.4-1",
"3.9.1-1",
"3.9.1-1build1",
"3.9.1-1ubuntu0.1",
"3.9.1-1ubuntu0.1+esm1",
"3.9.1-1ubuntu0.1+esm2",
"3.9.1-1ubuntu0.1+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-aiohttp",
"binary_version": "3.13.3-3ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "python-aiohttp",
"purl": "pkg:deb/ubuntu/python-aiohttp@3.13.3-3ubuntu1+esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.11.16-1",
"3.13.1-1",
"3.13.3-3",
"3.13.3-3ubuntu1",
"3.13.3-3ubuntu1+esm1"
]
}
],
"aliases": [],
"details": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.",
"id": "UBUNTU-CVE-2026-69244",
"modified": "2026-08-06T00:23:23Z",
"published": "2026-08-03T21:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-69244"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-69244"
},
{
"type": "REPORT",
"url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273"
},
{
"type": "REPORT",
"url": "https://github.com/aio-libs/aiohttp/pull/13223"
},
{
"type": "REPORT",
"url": "https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d"
},
{
"type": "REPORT",
"url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-69244"
]
}
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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.
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- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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