Bug 2431306 - CVE-2026-21441 mingw-python-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) [fedora-42]
Summary: CVE-2026-21441 mingw-python-urllib3: urllib3 vulnerable to decompression-bomb...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: mingw-python-urllib3
Version: 42
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Sandro Mani
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["923f2eaa-6fec-4f4f-b7d5-7...
Depends On:
Blocks: CVE-2026-21441
TreeView+ depends on / blocked
 
Reported: 2026-01-20 19:01 UTC by Dhananjay Arunesh
Modified: 2026-01-31 17:27 UTC (History)
1 user (show)

Fixed In Version: mingw-python-urllib3-2.6.3-1.fc42 mingw-python-urllib3-2.6.3-1.fc43
Clone Of:
Environment:
Last Closed: 2026-01-31 17:10:04 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Dhananjay Arunesh 2026-01-20 19:01:13 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Fedora Update System 2026-01-21 18:31:49 UTC
FEDORA-2026-2b6dfd7c83 (mingw-python-urllib3-2.6.3-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2b6dfd7c83

Comment 2 Fedora Update System 2026-01-21 18:32:05 UTC
FEDORA-2026-8b7270b473 (mingw-python-urllib3-2.6.3-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-8b7270b473

Comment 3 Fedora Update System 2026-01-22 01:43:29 UTC
FEDORA-2026-8b7270b473 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-8b7270b473`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8b7270b473

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-01-22 01:55:02 UTC
FEDORA-2026-2b6dfd7c83 has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-2b6dfd7c83`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2b6dfd7c83

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-01-31 17:10:04 UTC
FEDORA-2026-2b6dfd7c83 (mingw-python-urllib3-2.6.3-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-01-31 17:27:50 UTC
FEDORA-2026-8b7270b473 (mingw-python-urllib3-2.6.3-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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