Login Request a demo
High severity · published Nov 14, 2023
CVE-2023-47627
Request smuggling in aiohttp
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
aiohttp · aio-libs
< 3.8.6 · source: vendor, NVD
Affected product
AI
aiohttp
aio-libs
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-47627
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-47627
Patch
https://github.com/aio-libs/aiohttp/commit/d5c12ba890557a575c313bb3017910d7616fce3d
Exploit
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-gfw2-4jvh-wgfg
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUSJVQ7OQ55RWL4XAX2F5EZ73N4ZSH6U/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VDKQ6HM3KNDU4OQI476ZWT4O7DMSIT35/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WQYQL6WV535EEKSNH7KRARLLMOW5WXDM/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html
More from aiohttp
9.1
CVE-2026-34520
AIOHTTP: C parser (llhttp) accepts null bytes and control characters in response header values - header injection / security bypass
8.2
CVE-2026-111066
AIOHTTP: File descriptor exhaustion in multipart requests
8.2
CVE-2026-111064
aiohttp server lacks an initial request/header timeout
7.5
CVE-2026-54273
AIOHTTP: HTTP/1 Pipelined Requests Queue Without Limit
7.5
CVE-2026-54280
AIOHTTP: Payload Response Resources Are Not Closed After Mid-Body Disconnect