CVE-2026-35543 — Incorrect Resource Transfer Between Spheres in Webmail

CWE-669 — Incorrect Resource Transfer Between Spheres9 documents7 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 87.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Roundcube WebmailRoundcube Roundcubemail
Timeline
PublishedApr 3

Description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages3 packages

▶CVEListV5roundcube/webmail1.6.0 — 1.6.14+1
▶NVDroundcube/webmail1.6.0 — 1.6.14+1
▶Packagistroundcube/roundcubemail1.7-beta — 1.7-rc5

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
GHSA
Roundcube Webmail: Bypass of remote image blocking via SVG content (with animate attributes) in an e-mail message↗2026-04-03
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CVEList
CVE-2026-35543: An issue was discovered in Roundcube Webmail before 1↗2026-04-03
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OSV
CVE-2026-35543: An issue was discovered in Roundcube Webmail before 1↗2026-04-03
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OSV
Roundcube Webmail: Bypass of remote image blocking via SVG content (with animate attributes) in an e-mail message↗2026-04-03
▶

📋Vendor Advisories

1
Debian
CVE-2026-35543: roundcube - An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remot...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-35543 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

2
Bugzilla
CVE-2026-35543 roundcubemail: Roundcube Webmail: Information disclosure and access-control bypass via animated SVG in email [fedora-all]↗2026-04-03
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Bugzilla
CVE-2026-35543 roundcubemail: Roundcube Webmail: Information disclosure and access-control bypass via animated SVG in email [epel-all]↗2026-04-03
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CVE-2026-35543 — Roundcube Webmail vulnerability | cvebase