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TI-2026-27650 Aliases CVE-2026-35540GHSA-vxg2-hhgr-37fx

Server-side request forgery in Roundcube Webmail

Priority LOW 29CWE-669Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00401 34th percentileScored 2026-11-07
Fix Fixed Webmail (Roundcube): 1.6.14roundcube/roundcubemail (Packagist): 1.7-rc5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RoundcubeWebmail1.6.0 to before 1.6.141.6.14Patch availableCNA
—roundcube/roundcubemail (Packagist)1.7-beta to before 1.7-rc51.7-rc5Patch availableGHSA-vxg2-hhgr-37fx
  • Webmail VendorRoundcube Affected 1.6.0 to before 1.6.14 Fixed in 1.6.14 Patch available CNA
  • roundcube/roundcubemail (Packagist) Vendor— Affected 1.7-beta to before 1.7-rc5 Fixed in 1.7-rc5 Patch available GHSA-vxg2-hhgr-37fx

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*1.6.0 to before 1.6.14VulnerableRoundcube
  • cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* Versions 1.6.0 to before 1.6.14 Vulnerable ·Roundcube

Remediation

  • Fix · CNA Webmail (Roundcube) Fixed in 1.6.14
  • Fix · GHSA-vxg2-hhgr-37fx roundcube/roundcubemail (Packagist) Fixed in 1.7-rc5 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35540
  2. 2026-10-03 Alias added: GHSA-vxg2-hhgr-37fx

References

Patch 2

Advisory 2

Other 3

  • TI-2025-31204 Deserialization of untrusted data in Roundcube Webmail KEVCVSS 3.1CRITICAL 9.9
  • TI-2021-19778 Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-10051 rcube_image.php in Roundcube Webmail before 1.4.4 allows attackers to execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-28025 A Cross-Site Scripting vulnerability in Roundcube through 1.5.7 and 1.6.x through 1.6.7… KEVCVSS 3.1CRITICAL 9.3
  • TI-2017-12250 Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows… KEVCVSS 3.1HIGH 7.8
  • TI-2025-41994 Cross-site scripting in Roundcube Webmail KEVCVSS 3.1HIGH 7.2
See all 112 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences