🛡️ CVE-2025-69223 — aiohttp

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-409 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb ### Summary A zip bomb can be used to execute a DoS against the aiohttp server. ### Impact An attacker may be able to send a compressed request that when decompressed by aiohttp could exhaust the host's memory. ------ Patch: https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c9138a

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software and timeline

Affected software: aiohttp (fixed in 3.13.3). Published on 5 January 2026 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

CVE-2025-69223 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-409
Public Exploit ✅ No
Source OSV
Published 2026-01-05
Updated 2026-08-12
Modified 2026-08-04

Affected Packages

Software From version Fixed in
aiohttp — 3.13.3

Site Security Check

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More CVE 2025 advisories

Part of CVE 2025 in the advisory index.