What’s Vulnerable › Vulnerabilities

CVE-2025-69223: AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-05 · updated 2026-10-11
• Weakness: CWE-409

Description

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 when decompressed by AIOHTTP could exhaust the host's memory. This issue is fixed in version 3.13.3.

Affected products

• aio-libs aiohttp: before 3.13.3 — fixed in 3.13.3
• Pypi Aiohttp: before 3.13.3; 0.1, 0.10.0, 0.10.1, 0.10.2, 0.11.0, 0.12.0 (+297) — fixed in 3.13.3

How to fix

Upgrade to a fixed version: aio-libs aiohttp 3.13.3; Pypi Aiohttp 3.13.3. Check the vendor advisory for mitigations.

References

• https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c9138a
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6mq8-rvhq-8wgg
• https://access.redhat.com/errata/RHSA-2026:10184
• https://access.redhat.com/errata/RHSA-2026:1249
• https://access.redhat.com/errata/RHSA-2026:1497
• https://access.redhat.com/errata/RHSA-2026:1506
• https://access.redhat.com/errata/RHSA-2026:1596
• https://access.redhat.com/errata/RHSA-2026:1599
• https://access.redhat.com/errata/RHSA-2026:1609
• https://access.redhat.com/errata/RHSA-2026:19712
• https://access.redhat.com/errata/RHSA-2026:2106
• https://access.redhat.com/errata/RHSA-2026:2695

Get alerted when CVE-2025-69223 or the next vulnerability affects your stack