CVE-2025-69228
Published: 06 January 2026
Summary
CVE-2025-69228 is a high-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Aiohttp Aiohttp. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); 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.
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.
Imposes an inactivity-based limit on network resource allocation, throttling the number of concurrently held connections.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct remote DoS via application exploitation causing memory exhaustion (CWE-770).
NVD Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow a request to be crafted in such a way that an AIOHTTP server's memory fills up uncontrollably during processing. If an application includes a…
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handler that uses the Request.post() method, an attacker may be able to freeze the server by exhausting the memory. This issue is fixed in version 3.13.3.
Deeper analysisAI
CVE-2025-69228 is a denial-of-service vulnerability in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. Affected versions are 3.13.2 and earlier, where a specially crafted request can cause the server's memory to fill up uncontrollably during processing. This occurs specifically if an application includes a handler that uses the Request.post() method, leading to potential server freezing due to memory exhaustion. The issue is classified under CWE-770 (Allocation of Resources Without Limits or Throttling) with 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).
The vulnerability can be exploited remotely by any unauthenticated attacker with network access to the AIOHTTP server. By sending a maliciously crafted request, the attacker triggers excessive memory allocation in the server's request processing logic, resulting in resource exhaustion and denial of service. No user interaction is required, and the attack has low complexity, making it feasible for remote attackers to repeatedly target vulnerable servers and render them unresponsive.
Mitigation is available through upgrading to AIOHTTP version 3.13.3, which addresses the issue. The official security advisory (GHSA-6jhg-hg63-jvvf) and the fixing commit (b7dbd35375aedbcd712cbae8ad513d56d11cce60) on the aio-libs/aiohttp GitHub repository provide detailed patch information for developers.
Details
- CWE(s)