CVE-2026-35540_CVE-2026-35540

5.4 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts.

Basic Information

ID CVE-2026-35540

Source mitre

Published Apr 3, 2026 at 03:47

Modified Apr 3, 2026 at 12:52

Affected Product

Vendor Roundcube

Product Webmail

Version 1.6.0

Affected Versions Roundcube Webmail 1.6.0

CWE Classification

CWE-669

References

{
    "lastseen": "",
    "description": "An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts.",
    "published": "2026-04-03T03:47:51.456Z",
    "modified": "2026-04-03T12:52:38.240Z",
    "type": "cve",
    "title": "CVE-2026-35540",
    "source": "mitre",
    "references": "https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14\nhttps://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5\nhttps://github.com/roundcube/roundcubemail/commit/579b68eff90650a5c782e153debd66c765648942\nhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.14\nhttps://github.com/roundcube/roundcubemail/commit/27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870",
    "id": "CVE-2026-35540",
    "bulletinFamily": "",
    "cwe": [
        "CWE-669"
    ],
    "cvelist": null,
    "sourceData": "Roundcube Webmail 1.6.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Webmail",
    "version": "1.6.0",
    "vendor": "Roundcube",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}