6.6

CVE-2025-69229: aio-libs aiohttp

CVSS: 6.6v4.0MediumAnalyzed
AliasesGHSA-g84x-mcqj-x9qqPYSEC-2026-1106UBUNTU-CVE-2025-69229
Published 05-01-2026Last modified 06-01-2026
Open JSON

Vulnerability summary

CVE-2025-69229 is a medium (CVSS 6.6) vulnerability in aio-libs aiohttp. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.6/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.40%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 7
OPENSUSE-SU-2026:10025-1OPENSUSE-SU-2026:20204-1SUSE-SU-2026:0858-1SUSE-SU-2026:0859-1SUSE-SU-2026:20425-1CGA-FXWQ-49GQ-9WRW

Timeline

  1. 05-01-2026
    PublishedVulnerability first disclosed.
  2. 06-01-2026
    Last modifiedVulnerability information updated.

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.

CVSS metrics

9 scores · 7 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.01 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard22 products
  • airflow-2< 2.11.0-r19
  • airflow-2-bitnami-compat< 2.11.0-r19
  • airflow-2-compat< 2.11.0-r19
  • airflow-2-iamguarded-compat< 2.11.0-r19
  • airflow-3< 3.2.0-r0 | < 3.1.5-r2
Wolfi9 products
  • airflow-3< 3.2.0-r0 | < 3.1.5-r2
  • airflow-3-bitnami-compatAll versions (No fix recorded)
  • checkov< 3.2.499-r0
  • dask-kubernetes< 2025.7.0-r4
  • kserve-storage-controller< 0.17.0-r2
Aio-libs1 product
Aiohttp1 product
Debian1 product
  • python-aiohttpAll versions (No fix recorded) | < 3.11.16-1+deb13u1 | < 3.13.3-1
PyPI1 product
  • aiohttp< 3.13.3
Ubuntu1 product
  • python-aiohttpAll versions (No fix recorded) | < 3.0.1-1ubuntu0.1~esm6 | < 3.8.1-4ubuntu0.2+esm2 | < 3.9.1-1ubuntu0.1+esm2 | < 3.11.16-1ubuntu0.1

7 vendors · 36 products

References

12 links
Show all 12 references