CVE WatchOct 22, 2026

CVE-2026-114724

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

CVSS

7.4

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Oct 22, 2026 · Last modified: Oct 22, 2026 · CWE-502

EPSS · 30d

Not enough EPSS history yet.

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.

Official references

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