CVE-2026-114724: Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in
Source GCVE Database
Not known to be exploited · CVSS 7.4 High : upgrade to 1.7.5 or 1.6.20 soon.
Data as of 29 Oct 2026, 16:06 UTC
Thin evidence
One scorer or none| CNA (mitre) | CVSS 3.1 | 7.4 |
|---|
- Patch
- Available – fixed in 1.7.5, 1.6.20
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade Webmail to 1.7.5 or 1.6.20.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| RoundcubeWebmail | Affected
| Fixed in
|
| RoundcubeWebmail | Affected
| Fixed in
|
GitHubWebmailpkg:github/WebmailOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should upgrade Roundcube Webmail to version 1.6.20 or later, or 1.7.5 or later, where the vulnerability has been fixed by rejecting session keys prefixed with “!”. No other mitigation is indicated as the fix is available and addresses the root cause.
Description
Roundcube Webmail versions before 1.6.20 and 1.7.x before 1.7.5 contain a vulnerability in the rcube_session::unserialize() function. This flaw allows an attacker who can influence stored session data to perform PHP object injection by exploiting how session keys prefixed with “!” are handled. The issue was fixed by rejecting such keys in a subsequent update.
References
- nvd.nist.gov/vuln/detail/CVE-2026-114724 (opens in a new tab)
- github.com/roundcube/roundcubemail/commit/833770d3d3c35cfde74cc2614d368f25a75b6f99 (opens in a new tab)
- github.com/roundcube/roundcubemail/commit/93284f3f0e13f99af37fc3b81861e142eea8a922 (opens in a new tab)
- bugs.debian.org/1151279 (opens in a new tab)
- github.com/roundcube/roundcubemail/releases/tag/1.6.20 (opens in a new tab)
- github.com/roundcube/roundcubemail/releases/tag/1.7.5 (opens in a new tab)
- roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 (opens in a new tab)