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Webmail EUVD-2026-18579

| CVE-2026-35538 LOW
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (CWE-88)
2026-04-03 mitre GHSA-8jr8-v43g-5c57
CSRF Webmail
3.1
CVSS 3.1 · NVD

Severity by source

NVD PRIMARY
3.1 LOW
AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

4
Patch released
Apr 04, 2026 - 08:30 nvd
Patch available
EUVD ID Assigned
Apr 03, 2026 - 04:30 euvd
EUVD-2026-18579
Analysis Generated
Apr 03, 2026 - 04:30 vuln.today
CVE Published
Apr 03, 2026 - 03:35 nvd
LOW 3.1

DescriptionCVE.org

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsanitized IMAP SEARCH command arguments could lead to IMAP injection or CSRF bypass during mail search.

AnalysisAI

Roundcube Webmail before versions 1.5.14 and 1.6.14 allows authenticated remote attackers to conduct IMAP injection attacks or bypass CSRF protections via unsanitized IMAP SEARCH command arguments. The vulnerability requires user interaction (high complexity) and authenticated access, resulting in limited integrity impact without confidentiality or availability compromise. …

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Vulnerability AssessmentAI

Risk Assessment The risk profile is moderate-to-low despite the CVSS score of 3.1 (Low severity). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated Roundcube user receives a phishing email containing a crafted link that, when clicked while logged into Roundcube, injects IMAP commands into a background mail search request. Alternatively, an attacker with legitimate Roundcube account access manually injects IMAP protocol sequences into the search form to manipulate mail retrieval or trigger unintended server-side behavior. …
Remediation Administrators must upgrade Roundcube Webmail to version 1.5.14 or later in the 1.5.x branch, or version 1.6.14 or later in the 1.6.x branch. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-18579 vulnerability details – vuln.today
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