CVE-2026-75003

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.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591b	Patch
https://github.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56	Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18	Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3	Release Notes
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:roundcube:webmail::::::::
	cpe:2.3:a:roundcube:webmail::::::::

History

No history.

Information

Published : 2026-08-17 13:16

Updated : 2026-09-10 19:18

NVD link : CVE-2026-75003

Mitre link : CVE-2026-75003

CVE.ORG link : CVE-2026-75003

JSON object : View

Products Affected

roundcube

webmail

CWE

CWE-669

Incorrect Resource Transfer Between Spheres

{"id": "CVE-2026-75003", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75003", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-17T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "Roundcube", "product": "Webmail", "versions": [{"status": "affected", "version": "1.6.0", "lessThan": "1.6.18", "versionType": "semver"}, {"status": "affected", "version": "1.7.0", "lessThan": "1.7.3", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-17T13:16:54.900", "references": [{"url": "https://github.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591b", "tags": ["Patch"], "source": "cve@mitre.org"}, {"url": "https://github.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56", "tags": ["Patch"], "source": "cve@mitre.org"}, {"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.18", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.7.3", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-669"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-10T19:18:27.853", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D51A5415-8AC6-49A9-AAA8-9ED72D9A551E", "versionEndExcluding": "1.6.18", "versionStartIncluding": "1.6.0"}, {"criteria": "cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D5C9B7FB-8223-444C-B728-6E724AC2F0C9", "versionEndExcluding": "1.7.3", "versionStartIncluding": "1.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}