Bug 2496771 (CVE-2026-9079)

Summary: CVE-2026-9079 libcurl: libcurl: Information disclosure due to failure to clear proxy authentication credentials
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin, csutherl, dbosanac, gtanzill, jbuscemi, jclere, jmitchel, jreimann, kshier, mdessi, mrizzi, pcattana, pjindal, plodge, rekumar, rhel-process-autobot, sdawley, stcannon, szappis, teagle, vchlup, vvoronko, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in curl. When libcurl is instructed to clear proxy authentication credentials, it fails to do so, leaving the old credentials available. This could lead to the unintended reuse of sensitive proxy authentication credentials for subsequent network transfers, potentially resulting in unauthorized access or information disclosure.
 Story Points: ---
Clone Of: Environment:
Last Closed: 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: 2509775, 2497473    
Bug Blocks:    

Description OSIDB Bzimport 2026-07-03 07:02:13 UTC 
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 4 errata-xmlrpc 2026-08-19 13:28:38 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services 2.4.62.SP5

Via RHSA-2026:56869 https://access.redhat.com/errata/RHSA-2026:56869