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CVE-2026-114724

7.4 · HIGH

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize().

Published Oct 22, 2026roundcubeCWE-502EPSS 0.41%

Overview

CVE-2026-114724 is a high-severity vulnerability affecting roundcube webmail. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from roundcube. Update webmail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
roundcubewebmail>= 1.6.0, < 1.6.20Affected

References

Refbugs.debian.org/1151279GitHubgithub.com/roundcube/roundcubemail/commit/833770d3d3c35cfde74cc2614d368f25a75b6f99GitHubgithub.com/roundcube/roundcubemail/commit/93284f3f0e13f99af37fc3b81861e142eea8a922GitHubgithub.com/roundcube/roundcubemail/releases/tag/1.6.20GitHubgithub.com/roundcube/roundcubemail/releases/tag/1.7.5Refroundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-114724?

CVE-2026-114724 is a high-severity vulnerability affecting roundcube webmail. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-114724?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-114724?

Check the references section for vendor advisories and patches from roundcube. Update webmail to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-114724?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-114724 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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