In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via… (CVE-2026-74997)
Roundcube Webmail versions before 1.6.18 and 1.7.x before 1.7.3 are vulnerable to remote code execution via the cmd_learn driver of the markasjunk plugin. This vulnerability arises from crafted placeholder replacement values and affects only instances using this specific plugin driver. The vulnerability has a high severity with a CVSS score of 8.8.
AI Analysis
Technical Summary
CVE-2026-74997 describes a remote code execution vulnerability in Roundcube Webmail's markasjunk plugin cmd_learn driver. Versions prior to 1.6.18 and 1.7.x prior to 1.7.3 are affected. The vulnerability is triggered by crafted placeholder replacement values that allow an attacker with low privileges to execute arbitrary code remotely. This issue is specific to Roundcube instances that have the markasjunk plugin enabled with the cmd_learn driver.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely with low privileges, potentially leading to full compromise of the affected Roundcube Webmail instance. Confidentiality, integrity, and availability impacts are rated high according to the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or vendor advisories are provided, users should monitor official Roundcube channels for updates and consider disabling the markasjunk plugin or its cmd_learn driver as a temporary mitigation until a fix is available.
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via… (CVE-2026-74997)
Description
Roundcube Webmail versions before 1.6.18 and 1.7.x before 1.7.3 are vulnerable to remote code execution via the cmd_learn driver of the markasjunk plugin. This vulnerability arises from crafted placeholder replacement values and affects only instances using this specific plugin driver. The vulnerability has a high severity with a CVSS score of 8.8.
CVSS v3.1
Score 8.8high
Affected software
pkg:github/roundcube/roundcubemailRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74997 describes a remote code execution vulnerability in Roundcube Webmail's markasjunk plugin cmd_learn driver. Versions prior to 1.6.18 and 1.7.x prior to 1.7.3 are affected. The vulnerability is triggered by crafted placeholder replacement values that allow an attacker with low privileges to execute arbitrary code remotely. This issue is specific to Roundcube instances that have the markasjunk plugin enabled with the cmd_learn driver.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely with low privileges, potentially leading to full compromise of the affected Roundcube Webmail instance. Confidentiality, integrity, and availability impacts are rated high according to the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or vendor advisories are provided, users should monitor official Roundcube channels for updates and consider disabling the markasjunk plugin or its cmd_learn driver as a temporary mitigation until a fix is available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-q5rh-mmp4-ppgq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74997"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a833349bf8831d5392a407c
Added to database: 08/17/2026, 16:14:01 UTC
Last enriched: 08/17/2026, 16:19:36 UTC
Last updated: 08/18/2026, 02:41:00 UTC
Views: 5
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