Bug 2497438

Summary: CVE-2026-9546 davix: libcurl: Information disclosure due to persistent Referer header [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Jon Moroney <jmoroney>
Component: davixAssignee: Mihai Patrascoiu <mihai.patrascoiu>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: adev88, mattias.ellert, mihai.patrascoiu
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["f740ab0b-53a7-444e-9797-f59c54f9c4db"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-14 13:02:12 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: 2496770    

Description Jon Moroney 2026-07-06 19:19:27 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.

A vulnerability in libcurl caused the HTTP `Referer:` header to persist even
when explicitly cleared. While the documentation states that passing NULL to
`CURLOPT_REFERER` suppresses the header, the option failed to clear the
internal state. As a result the previous referrer string was erroneously
reused and sent in subsequent requests, potentially leaking sensitive
information to unintended servers.
Comment 1 Mihai Patrascoiu 2026-07-14 13:02:12 UTC 
Hello,

The CVE-2026-9546 vulnerability impacts curl versions 8.18.0 --> 8.20.0.
Davix embeds curl v7.69.0 for EPEL8, whereas for all other platforms it uses the system-provided curl.

This vulnerability does not impact Davix.
Closing.

Cheers,
Mihai