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CVE-2026-114724

8.1, high

Roundcube Webmail Deserialization of Untrusted Data Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.1, high high CVSS v3.1
EPSS, next 30 days
0.3% higher than 17.5% of scored CVEs
Exploitation
No public evidence
Published
22 Oct 20268 days ago

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.

Details

Vendor
Roundcube
Product
Webmail
Weakness
CWE-502 (opens in a new tab)
Status
Analyzed
Updated
29 Oct 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References 6

Patches and fixes 2

Advisories 2

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Roundcube CVEs

Every Roundcube CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2025-68461 RoundCube Webmail Cross-site Scripting Vulnerability KEV EPSS 27% 6.1, medium
  • CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Vulnerability KEV EPSS 99% 8.8, high
  • CVE-2024-42009 RoundCube Webmail Cross-Site Scripting Vulnerability KEV EPSS 83% 9.3, critical
  • CVE-2024-37383 RoundCube Webmail Cross-Site Scripting (XSS) Vulnerability KEV EPSS 74% 6.1, medium
  • CVE-2023-5631 Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability KEV EPSS 76% 5.4, medium
  • CVE-2023-43770 Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability KEV EPSS 64% 6.1, medium
  • CVE-2021-44026 Roundcube Webmail SQL Injection Vulnerability KEV EPSS 70% 9.8, critical
  • CVE-2020-35730 Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability KEV EPSS 33% 6.1, medium

Beyond this page

Is CVE-2026-114724 in your network?

This page tells you how dangerous CVE-2026-114724 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-114724 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 30 Oct 2026, not the live upstream state.