P4Verified

CVE-2025-69227: aiohttp before 3.13.3 (exclusive), < 3.13.3

CVE-2025-69227. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00396 (percentile 0.31766), scored 10-Oct-2026.

Affected technology

aiohttp · before 3.13.3 (exclusive)
aiohttp

aiohttp · < 3.13.3
aio-libs

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source says 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. Vendor/CNA’s CVSS 4.0 assessment (base score 6.6/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 11-Oct-2026 23:39 UTC

CWE: CWE-835
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · NVD
EPSS: 0.00396 · percentile 0.3181 · 2026-10-11
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-11 23:42:05.235979+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-11 23:39:08.456424+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-69227.html