CVE-2025-69230: aio-libs aiohttp · Logging of Excessive Data
Affects aio-libs aiohttpSource CVE Database V5
Not known to be exploited · CVSS 2.7 Low : upgrade to 3.13.3 when convenient.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.13.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:UExploitation evidence
Disclosed: evidence found.
CVE published 6 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade aio-libs aiohttp to 3.13.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| aio-libsaiohttp | Affected
| Fixed in
|
PyPIaiohttppkg:pypi/aiohttpOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
European organizations should immediately upgrade aiohttp to version 3.13.3 or later to remediate this vulnerability. In addition, review and harden logging configurations to limit the volume and verbosity of logs generated by web frameworks, especially for warning-level messages. Implement rate limiting or filtering on incoming HTTP headers to detect and block suspicious or malformed Cookie headers that could trigger excessive logging. Enhance monitoring of log storage utilization and set alerts for abnormal increases in log volume. Consider deploying Web Application Firewalls (WAFs) to detect and block anomalous HTTP requests with malformed cookies. Conduct regular audits of third-party dependencies to ensure timely application of security patches. Finally, educate development teams on secure handling of HTTP headers and the importance of updating asynchronous frameworks promptly.
Description
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.