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1460 articles · 102556 vulns · 38/41 feeds (7d)
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6.1
CVE-2026-35539PATCHED
roundcube · webmail

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

Description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.

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/1b30edf5369668c92fe91dae3d52e477c808aa4f
  • https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
  • https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1
  • https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
  • https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab

Related News (1 articles)

Tier C
VulDB4h ago
CVE-2026-35539 | Roundcube Webmail up to 1.5.13/1.6.13 HTML Attachment HTML injection
→ No new info (linked only)
CVSS 3.16.1 HIGH
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA KEV❌ No
Actively exploited❌ No
Patch available
1.5.141.6.14
CWECWE-79
PublishedApr 3, 2026
Last enriched4h agov2
Tags
HTML injection
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-2026-35537
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
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: affectedVersions, severity, tags
Apr 3, 2026

Version History

v2
Last enriched 4h ago
v2Tier C4h ago

Updated affected versions to 1.5.13 and 1.6.13, changed severity to HIGH, and noted that no exploit is available.

affectedVersionsseveritytags
via VulDB
v15h ago

Initial creation