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Roundcube Webmail EUVDEUVD-2026-60169

| CVE-2026-75003 MEDIUM
Incorrect Resource Transfer Between Spheres (CWE-669)
2026-08-17 mitre GHSA-mh9g-rh94-w7mh
Information Disclosure Privilege Escalation Webmail Suse
5.8
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
5.8 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
vuln.today AI
4.7 MEDIUM

Email rendering requires the recipient to open or preview the message (UI:R); scope changes because the attacker's external server receives victim data; confidentiality impact is limited to IP and metadata leakage.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

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

Lifecycle Timeline

3
Patch available
Aug 17, 2026 - 14:15 EUVD
Source Code Evidence Fetched
Aug 17, 2026 - 13:40 vuln.today
Analysis Generated
Aug 17, 2026 - 13:40 vuln.today

DescriptionCVE.org

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remote image blocking, which may lead to information disclosure or privilege escalation.

AnalysisAI

SVG FuncIRI parsing in Roundcube Webmail allows remote unauthenticated attackers to bypass the webmail's remote content blocking mechanism by embedding a crafted SVG containing an unclosed url() in a FuncIRI attribute within an email. Affected are all 1.6.x versions before 1.6.18 and all 1.7.x versions before 1.7.3. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send email with malformed SVG FuncIRI url()
Delivery
Recipient opens email in Roundcube
Exploit
Bypass remote content blocking filter
Execution
Browser fetches attacker-controlled external URL
Impact
Attacker server captures victim IP and metadata
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Vulnerability AssessmentAI

Exploitation The target must be a Roundcube Webmail installation running a version prior to 1.6.18 (stable) or 1.7.3 (development). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD CVSS 3.1 score of 5.8 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N) rates this as medium severity with changed scope. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker sends a crafted HTML email to a Roundcube user containing an SVG element with an unclosed url() expression in a FuncIRI attribute such as fill or filter. When the recipient views the email in Roundcube, the malformed url() bypasses the remote content blocking filter, causing the browser to make an outbound HTTP request to an attacker-controlled server. …
Remediation Upgrade to Roundcube Webmail 1.6.18 (stable branch) or 1.7.3 (development branch), both released August 9, 2026 and available via the vendor advisory at https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 and GitHub releases at https://github.com/roundcube/roundcubemail/releases/tag/1.6.18 and https://github.com/roundcube/roundcubemail/releases/tag/1.7.3. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate

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EUVD-2026-60169 vulnerability details – vuln.today
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