What is CVE-2025-69230?

CVE-2025-69230 is a medium-severity vulnerability in Aiohttp, classified under CWE-779. CVSS score: 5.3/10. Published 2026-01-06.

How severe is CVE-2025-69230?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Aiohttp

CVE-2025-69230

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, reading multiple invalid cookies can lead to a logging storm. If the cookies attribute is accessed in an application, then an attacker may be able to trigger a storm of warning-level logs using a specially crafted Cookie header. This issue is fixed in 3.13.3.

Published 2026-01-06 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000

Affected products

Aiohttp
Aio-Libs Aiohttp — versions < 3.13.3

Weakness classification (CWE)

CWE-779

References

github.com/aio-libs/aiohttp/security/advisories/GHSA-fh55-r93g-j68g (Patch, Vendor Advisory)
github.com/aio-libs/aiohttp/commit/64629a0834f94e46d9881f4e99c41a137e1f3326 (Patch)

Frequently asked questions

What is CVE-2025-69230?: CVE-2025-69230 is a medium-severity vulnerability in Aiohttp, classified under CWE-779. CVSS score: 5.3/10. Published 2026-01-06.
How severe is CVE-2025-69230?: Medium severity. CVSS v3 base score is 5.3 out of 10.