Bug 2486422

Summary: CVE-2026-43972 erlang-gun: Gun: Cross-origin cookie injection leading to session fixation and account takeover. [fedora-all]
Product: [Fedora] Fedora Reporter: Keith Grant <kgrant>
Component: erlang-gunAssignee: Peter Lemenkov <lemenkov>
Status: CLOSED ERRATA QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: rawhideCC: lemenkov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b4cb6b82-7bad-4434-8b97-485d150d3d2a"]}
Fixed In Version: erlang-gun-2.4.1-1.fc44 erlang-gun-2.4.1-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-06-21 01:00:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2486373    

Description Keith Grant 2026-06-08 16:30:30 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 2026-06-10 15:33:05 UTC
FEDORA-2026-a4dc8517d5 (erlang-cowboy-2.16.0-1.fc43, erlang-cowlib-2.17.0-1.fc43, and 1 more) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a4dc8517d5

Comment 2 Fedora Update System 2026-06-10 15:33:17 UTC
FEDORA-2026-ffef846ec1 (erlang-cowboy-2.16.0-1.fc44, erlang-cowlib-2.17.0-1.fc44, and 1 more) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ffef846ec1

Comment 3 Fedora Update System 2026-06-11 01:30:51 UTC
FEDORA-2026-a4dc8517d5 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-a4dc8517d5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a4dc8517d5

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

Comment 4 Fedora Update System 2026-06-11 01:49:40 UTC
FEDORA-2026-ffef846ec1 has been pushed to the Fedora 44 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-ffef846ec1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ffef846ec1

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

Comment 5 Fedora Update System 2026-06-13 01:43:27 UTC
FEDORA-2026-2aa86d411f 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-2026-2aa86d411f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aa86d411f

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

Comment 6 Fedora Update System 2026-06-13 01:55:47 UTC
FEDORA-2026-c17ea7a74d has been pushed to the Fedora 44 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-c17ea7a74d`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c17ea7a74d

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

Comment 7 Fedora Update System 2026-06-21 01:00:18 UTC
FEDORA-2026-c17ea7a74d (erlang-cowboy-2.16.1-1.fc44, erlang-cowlib-2.17.1-1.fc44, and 1 more) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-06-21 01:10:19 UTC
FEDORA-2026-2aa86d411f (erlang-cowboy-2.16.1-1.fc43, erlang-cowlib-2.17.1-1.fc43, and 1 more) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.