PT-2026-29984 · Roundcube+1 · Roundcube Webmail+1

Class_Nzm · CVE-2026-35545 · Published 2026-03-18 · Updated 2026-05-06

Positive Technologies (AI Summary)

CVSS v2.0

8.5

High

Base vector

AV:N/AC:L/Au:N/C:C/I:P/A:N

Name of the Vulnerable Software and Affected Versions Roundcube Webmail versions prior to 1.5.15 and prior to 1.6.15

Description A flaw exists in Roundcube Webmail that allows bypassing the remote image blocking feature through specially crafted SVG content within email messages. This bypass can potentially lead to information disclosure or access-control bypass. The issue involves the animate element utilizing attributes such as fill, filter, and stroke.

Recommendations Update Roundcube Webmail to version 1.5.15 or later. Update Roundcube Webmail to version 1.6.15 or later.

Exploit

Fix

DoS

Weakness Enumeration

CWE-669

Related Identifiers

BDU:2026-06325

CVE-2026-35545

GHSA-W846-74JR-76CV

MGASA-2026-0089

Affected Products

Red Os

Roundcube Webmail

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35545.json · Exploit
• https://github.com/roundcube/roundcubemail/commit/fe1320b199d3a2f58351bb699c9ed4316e73221b · Patch
• https://github.com/roundcube/roundcubemail/commit/9d18d524f3cc211003fc99e2e54eed09a2f3da88 · Patch
• https://github.com/roundcube/roundcubemail/commit/7ad62de184368bf42c0f522d1aacc030f5ddcc46 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-35545 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06325 · Security Note
• https://roundcube.net/news/2026/03/29/security-updates-1.7-rc6-1.6.15-1.5.15 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35545 · Security Note
• https://osv.dev/vulnerability/MGASA-2026-0089 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-w846-74jr-76cv · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-35545 · Security Note
• https://ubuntu.com/security/CVE-2026-35545 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-35545 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-35545 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-35545 · Vendor Advisory