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CVE-2025-69227

AIOHTTP vulnerable to DoS when bypassing asserts

Published: Jan 5, 2026Updated: Jan 14, 2026 Sources: CVE List NVD GHSA BDUCWE-835
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.3%
Top 74.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow for an infinite loop to occur when assert statements are bypassed, resulting in a DoS attack when processing a POST body. If optimizations are enabled (-O or PYTHONOPTIMIZE=1), and the application includes a handler that uses the Request.post() method, then an attacker may be able to execute a DoS attack with a specially crafted message. This issue is fixed in version 3.13.3.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-835

Affected Products

aiohttpaiohttp
Library
OSS Libraries / web-framework
aiohttpPyPIOSS Libraries
aiohttpСообщество свободного программного обеспечения
LibraryLibrary
OSS Libraries / generic-library
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
aiohttposs-projectOSS Libraries
pypipackage-ecosystemOSS Libraries
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/aio-libs/aiohttp/commit/bc1319ec3cbff9438a758951a30907b072561259
github.com
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jj3x-wxrx-4x23
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-69227
nvd.nist.gov
and 5 more references View all →

Timeline

Published
Jan 5, 2026
Last Updated
Jan 14, 2026

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