Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 allows the ImageMagick resource limits to be bypassed during thumbnail generation. When rcube_image falls back to GD, the available-memory check was applied only on Windows, so on other platforms a crafted image with large dimensions was processed by GD without any resource limit and could exhaust server memory. Upstream fixed this in the commit “Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation”, which applies the memory check on all platforms.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Roundcube Webmail unaffected
Version Status Constraints
1.6.0 affected < 1.6.20
1.7.0 affected < 1.7.5

No data.

No data.

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Vendors Products
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Webmail Subscribe

Project Subscriptions

Vendors Products
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Webmail Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugs.debian.org/1151279 cve-icon cve-icon
https://github.com/roundcube/roundcubemail/commit/0bea81121efd96f07432a837f391dbdd0dffa33f cve-icon cve-icon
https://github.com/roundcube/roundcubemail/commit/d28a5703294e971a577e3c4f7bfc33362e3f04cf cve-icon cve-icon
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 cve-icon cve-icon
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 cve-icon cve-icon
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 cve-icon cve-icon
History

Thu, 22 Oct 2026 06:45:00 +0000

Type Values Removed Values Added
Title ImageMagick Resource Limits Bypass During Thumbnail Generation Leading to Server Memory Exhaustion

Thu, 22 Oct 2026 02:00:00 +0000

Type Values Removed Values Added
Description Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 allows the ImageMagick resource limits to be bypassed during thumbnail generation. When rcube_image falls back to GD, the available-memory check was applied only on Windows, so on other platforms a crafted image with large dimensions was processed by GD without any resource limit and could exhaust server memory. Upstream fixed this in the commit “Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation”, which applies the memory check on all platforms.
First Time appeared Roundcube
Roundcube webmail
Weaknesses CWE-770
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Vendors & Products Roundcube
Roundcube webmail
References
Metrics cvssV3_1

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-22T01:44:01.558Z

Reserved: 2026-10-22T01:44:00.799Z

Link: CVE-2026-114723

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T02:17:00.190

Modified: 2026-10-22T02:17:00.190

Link: CVE-2026-114723

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T06:30:17Z

Weaknesses