Bug 2558884

Summary: CVE-2026-114724 roundcubemail: roundcubemail: Arbitrary code execution via session object injection [fedora-all]
Product: [Fedora] Fedora Reporter: Lukas Javorsky <ljavorsk>
Component: roundcubemailAssignee: Remi Collet <fedora>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: anon.amish, fedora, kevin, mhlavink, tm
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["f56af5bc-4075-4ef3-8555-8083cc4aa4e4"]}
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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: 2558730    

Description Lukas Javorsky 2026-10-22 11:22:46 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.

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize(). A session key prefixed with “!” was treated as having no value, and the reconstructed serialized string was emitted with a key but no corresponding value, desynchronizing the remainder of the input so that following session data was interpreted as a serialized value. This yields a PHP object injection primitive for an attacker able to influence stored session data. Upstream fixed this in the commit “Fix object injection primitive in rcube_session::unserialize() via “!”-prefixed session keys”, which rejects such keys.
Comment 1 Fedora Update System 2026-10-27 05:36:35 UTC 
FEDORA-2026-2aba9ce8fc (roundcubemail-1.7.5-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aba9ce8fc
Comment 2 Fedora Update System 2026-10-28 03:45:31 UTC 
FEDORA-2026-7002464a52 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-7002464a52`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-7002464a52

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 3 Fedora Update System 2026-10-28 04:01:52 UTC 
FEDORA-2026-2aba9ce8fc 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-2026-2aba9ce8fc`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aba9ce8fc

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