CVE-2026-35538: CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Roundcube Webmail
CVE-2026-35538 is a vulnerability in Roundcube Webmail versions before 1.5.14 and 1.6.14 where unsanitized IMAP SEARCH command arguments can lead to IMAP injection or CSRF bypass during mail search. The issue arises from improper neutralization of argument delimiters (CWE-88). The vulnerability has a low severity with a CVSS score of 3.1. No official patch or remediation level is currently confirmed from the vendor advisory. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability in Roundcube Webmail involves improper neutralization of argument delimiters in the IMAP SEARCH command, allowing injection attacks or cross-site request forgery (CSRF) bypass during mail search operations. It affects versions prior to 1.5.14 and 1.6.14. The CVSS 3.1 base score is 3.1, indicating low severity, with network attack vector, high attack complexity, low privileges required, and no user interaction needed. The vulnerability could allow limited integrity impact without confidentiality or availability impact.
Potential Impact
The impact is limited to potential IMAP injection or CSRF bypass during mail search, which could affect the integrity of mail search operations. There is no impact on confidentiality or availability according to the CVSS vector. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or remediation level is provided, users should monitor Roundcube's official channels for updates. Until a fix is available, cautious handling of IMAP SEARCH command inputs and restricting access to trusted users may reduce risk.
CVE-2026-35538: CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Roundcube Webmail
Description
CVE-2026-35538 is a vulnerability in Roundcube Webmail versions before 1.5.14 and 1.6.14 where unsanitized IMAP SEARCH command arguments can lead to IMAP injection or CSRF bypass during mail search. The issue arises from improper neutralization of argument delimiters (CWE-88). The vulnerability has a low severity with a CVSS score of 3.1. No official patch or remediation level is currently confirmed from the vendor advisory. There are no known exploits in the wild at this time.
CVSS v3.1
Score 3.1low
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
This vulnerability in Roundcube Webmail involves improper neutralization of argument delimiters in the IMAP SEARCH command, allowing injection attacks or cross-site request forgery (CSRF) bypass during mail search operations. It affects versions prior to 1.5.14 and 1.6.14. The CVSS 3.1 base score is 3.1, indicating low severity, with network attack vector, high attack complexity, low privileges required, and no user interaction needed. The vulnerability could allow limited integrity impact without confidentiality or availability impact.
Potential Impact
The impact is limited to potential IMAP injection or CSRF bypass during mail search, which could affect the integrity of mail search operations. There is no impact on confidentiality or availability according to the CVSS vector. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or remediation level is provided, users should monitor Roundcube's official channels for updates. Until a fix is available, cautious handling of IMAP SEARCH command inputs and restricting access to trusted users may reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-03T03:35:36.541Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69cf56590a160ebd92cd3e6e
Added to database: 04/03/2026, 05:55:37 UTC
Last enriched: 04/10/2026, 09:14:49 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 126
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