What is CVE-2025-69223?

CVE-2025-69223 is a high-severity vulnerability in Aio-libs Aiohttp, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-01-05.

How severe is CVE-2025-69223?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Aio-libs Aiohttp

CVE-2025-69223

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow a zip bomb to be used to execute a DoS against the AIOHTTP server. An attacker may be able to send a compressed request that wh…

EPSS: 0.001 (17.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Aio-libs Aiohttp — versions < 3.13.3

Weakness classification (CWE)

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6mq8-rvhq-8wgg (x_refsource_CONFIRM)
https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c9138a (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-69223?: CVE-2025-69223 is a high-severity vulnerability in Aio-libs Aiohttp, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-01-05.
How severe is CVE-2025-69223?: High severity. CVSS v3 base score is 7.5 out of 10.