Description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Published: 2026-04-03
Score: 3.7 Low
EPSS: < 1% Very Low
KEV: No
Impact: Unauthenticated arbitrary file write via unsafe session deserialization
Action: Patch Immediately
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6196-1 roundcube security update
Github GHSA Github GHSA GHSA-rxj3-rrwm-pj4r Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
History

Tue, 14 Apr 2026 16:45:00 +0000

Type Values Removed Values Added
Title Roundcube Webmail Unsafe Deserialization Enables Unauthenticated File Write via Session Data

Mon, 13 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*

Sat, 11 Apr 2026 15:30:00 +0000

Type Values Removed Values Added
References

Fri, 03 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Roundcube
Roundcube webmail
Vendors & Products Roundcube
Roundcube webmail

Fri, 03 Apr 2026 04:00:00 +0000

Type Values Removed Values Added
Description An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}


Subscriptions

Roundcube Webmail
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-11T14:12:39.387Z

Reserved: 2026-04-03T03:28:28.897Z

Link: CVE-2026-35537

cve-icon Vulnrichment

Updated: 2026-04-11T14:12:39.387Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-03T04:17:10.313

Modified: 2026-04-13T17:54:32.260

Link: CVE-2026-35537

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-14T16:41:51Z

Weaknesses