CVE-2026-35537 — Deserialization of Untrusted Data in Webmail

CWE-502 — Deserialization of Untrusted Data7 documents6 sources
Severity
7.5HIGHNVD
CNA3.7
EPSS
0.0%
top 86.70%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Roundcube WebmailRoundcube Roundcubemail
Timeline
PublishedApr 3

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5roundcube/webmail1.6.0 — 1.6.14+1
▶NVDroundcube/webmail1.6.0 — 1.6.14+1
▶Packagistroundcube/roundcubemail1.7-beta — 1.7-rc5

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
OSV
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler↗2026-04-03
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CVEList
CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1↗2026-04-03
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GHSA
Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler↗2026-04-03
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OSV
CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1↗2026-04-03
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📋Vendor Advisories

1
Debian
CVE-2026-35537: roundcube - An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe de...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-35537 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-35537 — Deserialization of Untrusted Data | cvebase