CVE-2025-69223
Published: 05 January 2026
Summary
CVE-2025-69223 is a high-severity Data Amplification (CWE-409) vulnerability in Aiohttp Aiohttp. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requires throttling and limits on resource allocation to prevent exhaustion.
This control implements explicit throttling on session allocation, addressing the weakness of allocating resources without limits.
Plan testing exercises resource allocation limits and throttling during simulated failures, directly addressing weaknesses that allow unbounded resource use.
Contingency plan updates ensure recovery strategies address unbounded resource allocation, making it harder for attackers to exploit lack of throttling to cause prolonged outages.
Provides continuity when unbounded resource allocation at the primary site leads to exhaustion and downtime.
Alternate services allow operations to continue when primary allocation of resources lacks limits or throttling.
Explicit planning of security-related actions requires defining limits, windows, and resource allocations, making allocation without throttling far less likely.
Measures of performance include tracking allocation behavior and throttling effectiveness, reducing the window for resource exhaustion attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability in public-facing AIOHTTP web framework directly enables remote exploitation for application-layer DoS via crafted compressed input.
NVD 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…
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that when decompressed by AIOHTTP could exhaust the host's memory. This issue is fixed in version 3.13.3.
Deeper analysisAI
CVE-2025-69223 is a denial-of-service vulnerability in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below are affected, as they improperly handle highly compressed data in requests, enabling a zip bomb attack. An attacker can send a maliciously crafted compressed request that, upon decompression by the AIOHTTP server, exhausts the host's memory resources. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and maps to CWE-409 (Improper Handling of Highly Compressed Data) and CWE-770 (Allocation of Resources Without Limits or Throttling).
The attack requires no authentication or user interaction and can be launched remotely over the network with low complexity. Any unauthenticated attacker able to reach an affected AIOHTTP server can exploit it by transmitting a specially crafted zip bomb in a compressed HTTP request, resulting in memory exhaustion and potential server crashes or unresponsiveness.
The vulnerability is addressed in AIOHTTP version 3.13.3. Security practitioners should upgrade to this version for mitigation. Additional details are available in the GitHub security advisory (GHSA-6mq8-rvhq-8wgg) and the fixing commit (2b920c39002cee0ec5b402581779bbaaf7c9138a).
Details
- CWE(s)