Bug 2509775

Summary: CVE-2026-9079 curl: libcurl: Information disclosure due to failure to clear proxy authentication credentials [fedora-all]
Product: [Fedora] Fedora Reporter: Tomas Hoger <thoger>
Component: curlAssignee: Jan Macku <jamacku>
Status: MODIFIED --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 45CC: jamacku, jmigacz, kdudka, lzaoral, msekleta, paul, vmihalko
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["3fcbefd7-a8a3-4faa-a00f-21ca8eb7fdbf"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2496771    

Description Tomas Hoger 2026-07-31 13:46:10 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.

libcurl had a flaw that when instructed to clear proxy authentication
credentials which made it not do so, leaving the old credentials around to get
used for subsequent transfers that should not know nor use them.
Comment 1 Aoife Moloney 2026-08-17 15:44:17 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
Comment 2 Fedora Update System 2026-09-09 06:58:28 UTC 
FEDORA-2026-f26b509a1a (curl-8.18.0-10.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f26b509a1a
Comment 3 Fedora Update System 2026-09-09 10:20:14 UTC 
FEDORA-2026-6841033933 (curl-8.15.0-10.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6841033933