Bug 2558634 (CVE-2026-114714)

Summary: CVE-2026-114714 roundcubemail: roundcubemail: Information disclosure via path traversal in squirrelmail_usercopy plugin
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Roundcube Webmail. When using the squirrelmail_usercopy plugin with a file-based backend, the application constructs file paths from user login names without properly sanitizing path separators. An authenticated remote attacker can exploit this path traversal vulnerability by submitting a crafted login name, leading to unauthorized information disclosure through reading and importing files outside the intended directory.
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Bug Depends On: 2562372, 2562375    
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Description OSIDB Bzimport 2026-10-22 01:21:28 UTC 
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a path traversal vulnerability in the squirrelmail_usercopy plugin. With the file based backend, the source path was built from the login name without rejecting path separators, so a login name containing a slash could cause files outside the configured squirrelmail_data_dir to be read and imported. Upstream fixed this in the commit “Fix unsafe use of a login name in SquirrelMail import file path”, which rejects login names containing a slash.