Home/CVE/aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. The HTTP parser in AIOHTTP has numerous
CVE

CVE-2023-47627

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. The HTTP parser in AIOHTTP has numerous

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. The HTTP parser in AIOHTTP has numerous problems with header parsing, which could lead to request smuggling. This parser is only used when AIOHTTP_NO_EXTENSIONS is enabled (or not using a prebuilt wheel).

These bugs have been addressed in commit d5c12ba89 which has been included in release version 3.8.6. Users are advised to upgrade. There are no known workarounds for these issues.

MEDIUM · CVSS 5.3 EPSS 0.00215
Schedule remediation
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
▤

Affected Products & Versions

1
aiohttp< 3.8.6
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI aiohttp MODERATE fixed in 3.8.6
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-gfw2-4jvh-wgfggithub.com
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Nov 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

10
msrcCVE-2023-47627
usnUSN-7642-1
suse-csafopenSUSE-SU-2024:13465-1
rhsaRHSA-2024:1640Important
rhsaRHSA-2024:1878Moderate
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/aio-libs/aiohttp/commit/d5c12ba890557a575c313bb3017910d7616fce3dPatch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUSJVQ7OQ55RWL4XAX2F5EZ73N4ZSH6U/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VDKQ6HM3KNDU4OQI476ZWT4O7DMSIT35/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQYQL6WV535EEKSNH7KRARLLMOW5WXDM/
https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html
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