Hi,

The following vulnerability was published for python-urllib3.

CVE-2026-44432[0]:
| urllib3 is an HTTP client library for Python. From 2.6.0 to before
| 2.7.0, urllib3 could decompress the whole response instead of the
| requested portion (1) during the second HTTPResponse.read(amt=N)
| call when the response was decompressed using the official Brotli
| library or (2) when HTTPResponse.drain_conn() was called after the
| response had been read and decompressed partially (compression
| algorithm did not matter here). These issues could cause urllib3 to
| fully decode a small amount of highly compressed data in a single
| operation. This could result in excessive resource consumption (high
| CPU usage and massive memory allocation for the decompressed data)
| on the client side. This vulnerability is fixed in 2.7.0.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-44432
https://www.cve.org/CVERecord?id=CVE-2026-44432
[1] https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j

Regards,
Salvatore

Hello,

Bug #1136654 in python-urllib3 reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below and you can check the diff of the fix at:

https://salsa.debian.org/python-team/packages/python-urllib3/-/commit/28273b3a4367c401d50c6e3ffbcde0f71c4a2ff6
------------------------------------------------------------------------
Update upstream source from tag 'upstream/2.7.0'

Update to upstream version '2.7.0'
with Debian dir 0618c7191d12a9f881f0025ef9ef2f7e2410879f

Closes: #1136654, #1140427
------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/1136654

We believe that the bug you reported is fixed in the latest version of
python-urllib3, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1136654@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Colin Watson <cjwatson@debian.org> (supplier of updated python-urllib3 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sun, 28 Jun 2026 17:48:21 +0100
Source: python-urllib3
Architecture: source
Version: 2.7.0-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <team+python@tracker.debian.org>
Changed-By: Colin Watson <cjwatson@debian.org>
Closes: 1136654 1140427 1140932
Changes:
 python-urllib3 (2.7.0-1) unstable; urgency=medium
 .
   * Team upload.
   * New upstream release:
     - CVE-2026-44432, CVE-2026-9375: Decompression-bomb safeguards bypassed
       in parts of the streaming API (closes: #1136654, #1140427).
     - GHSA-qccp-gfcp-xxvc: Sensitive headers forwarded across origins in
       proxied low-level redirects.
   * Don't parameterize tests using non-Collection iterables (closes:
     #1140932).
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