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GeezerVison is showing github.com — [3.11] gh-119452: Fix a potential virtual memory allocation denial of service in http.server (GH-142216) by miss-islington · Pull Request #142298 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Dec 5, 2025 •
edited by bedevere-app Bot
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The CGI server on Windows could consume the amount of memory specified
in the Content-Length header of the request even if the client does not
send such much data. Now it reads the POST request body by chunks,
therefore the memory consumption is proportional to the amount of sent
data.
(cherry picked from commit 0e4f4f1)

Co-authored-by: Serhiy Storchaka [email protected]

  • Issue: OOM a potential denial of service in the CGI server on Windows #119452

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@serhiy-storchaka @miss-islington
[3.14] pythongh-119452: Fix a potential virtual memory allocation den…
81b28b7
…ial of service in http.server (pythonGH-142216)

The CGI server on Windows could consume the amount of memory specified
in the Content-Length header of the request even if the client does not
send such much data. Now it reads the POST request body by chunks,
therefore the memory consumption is proportional to the amount of sent
data.
(cherry picked from commit 0e4f4f1)

Co-authored-by: Serhiy Storchaka <[email protected]>
This was referenced Dec 5, 2025
OOM a potential denial of service in the CGI server on Windows #119452
Closed
[3.14] gh-119452: Fix a potential virtual memory allocation denial of service in http.server #142216
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@bedevere-app bedevere-app Bot added the awaiting review label Dec 5, 2025
pablogsal
pablogsal reviewed Jan 25, 2026
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LGTM

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pablogsal
pablogsal approved these changes Jan 25, 2026
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@pablogsal
pablogsal merged commit fa1aae0 into python:3.11 Jan 25, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting review awaiting merge labels Jan 25, 2026
@miss-islington
miss-islington deleted the backport-0e4f4f1-3.11 branch January 25, 2026 17:10
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@pablogsal pablogsal pablogsal approved these changes

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3 participants

@miss-islington @pablogsal @serhiy-storchaka
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