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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Mon, 28 Sep 2026 07:53:15 +0000</lastBuildDate>
    <item>
      <title>CVE-2025-69229 — AIOHTTP vulnerable to DoS through chunked messages</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-69229</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; aio-libs aiohttp&lt;/p&gt;
&lt;p&gt;AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; aio-libs aiohttp&lt;/p&gt;
&lt;p&gt;AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2025-69229</guid>
    </item>
    <item>
      <title>GHSA-g84x-mcqj-x9qq — AIOHTTP vulnerable to DoS through chunked messages</title>
      <link>https://vulnerability.circl.lu/vuln/ghsa-g84x-mcqj-x9qq</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PyPI: aiohttp&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.&lt;/p&gt;
&lt;p&gt;### Impact&lt;/p&gt;
&lt;p&gt;If an application makes use of the `request.read()` method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time.&lt;/p&gt;
&lt;p&gt;-----&lt;/p&gt;
&lt;p&gt;Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712
Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PyPI: aiohttp&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.&lt;/p&gt;
&lt;p&gt;### Impact&lt;/p&gt;
&lt;p&gt;If an application makes use of the `request.read()` method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time.&lt;/p&gt;
&lt;p&gt;-----&lt;/p&gt;
&lt;p&gt;Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712
Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/ghsa-g84x-mcqj-x9qq</guid>
    </item>
    <item>
      <title>PYSEC-2026-1106 — AIOHTTP vulnerable to DoS through chunked messages</title>
      <link>https://vulnerability.circl.lu/vuln/pysec-2026-1106</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PyPI: aiohttp&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.&lt;/p&gt;
&lt;p&gt;### Impact&lt;/p&gt;
&lt;p&gt;If an application makes use of the `request.read()` method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time.&lt;/p&gt;
&lt;p&gt;-----&lt;/p&gt;
&lt;p&gt;Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712
Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; PyPI: aiohttp&lt;/p&gt;
&lt;p&gt;### Summary&lt;/p&gt;
&lt;p&gt;Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.&lt;/p&gt;
&lt;p&gt;### Impact&lt;/p&gt;
&lt;p&gt;If an application makes use of the `request.read()` method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time.&lt;/p&gt;
&lt;p&gt;-----&lt;/p&gt;
&lt;p&gt;Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712
Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/pysec-2026-1106</guid>
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