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3.7
CVE-2026-35537PATCHED
roundcube · webmail

CVE-2026-35537: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache sess

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.

Affected Products

VendorProductVersions
roundcubewebmail0, 1.6.0, 1.5.13, 1.6.13

References

  • https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
  • https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
  • https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74
  • https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
  • https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620
  • https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
  • https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3

Related News (1 articles)

Tier C
VulDB6h ago
CVE-2026-35537 | Roundcube Webmail up to 1.5.13/1.6.13 redis/memcache deserialization (618c5428edc69fb088e7ac6c89e506dd39df3)
→ No new info (linked only)
CVSS 3.13.7 HIGH
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA KEV❌ No
Actively exploited❌ No
Patch available
1.5.141.6.14
CWECWE-502
PublishedApr 3, 2026
Last enriched6h agov2
Trending Score27
Source articles1
Independent1
Info Completeness9/14
Missing: epss, kev, exploit, iocs, mitre_attack

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Related CVEs (5)

HIGHCVE-2026-35544EXP
CVE-2026-35544: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitiz
Trending: 46
HIGHCVE-2026-35542EXP
CVE-2026-35542: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed
Trending: 46
HIGHCVE-2026-35540EXP
CVE-2026-35540: An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization
Trending: 46
CRITICALCVE-2026-35538
CVE-2026-35538: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsanitized IMAP SEARCH command arguments could l
Trending: 30
HIGHCVE-2026-35539
CVE-2026-35539: An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachmen
Trending: 27

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 3, 2026
Patch Available
Apr 3, 2026
Discovered by ZDM
Apr 3, 2026
Updated: severity, affectedVersions
Apr 3, 2026

Version History

v2
Last enriched 6h ago
v2Tier C6h ago

Updated severity to HIGH, marked exploit as unavailable, and added new affected versions 1.5.13 and 1.6.13.

severityaffectedVersions
via VulDB
v17h ago

Initial creation