PT-2026-29983 · Unknown+1 · Roundcube Webmail+1

Nullcathedral1 · Publicado 2026-03-18 · Atualizado 2026-05-07 · CVE-2026-35544

Positive Technologies (AI Summary) · Pt

CVSS v3.1

5.3

Média

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Roundcube Webmail versões anteriores a 1.5.14 e anteriores a 1.6.14

Description A falha existe no Roundcube Webmail que decorre da sanitização inadequada de Folhas de Estilo em Cascata (CSS) dentro de mensagens de e-mail HTML. Isso pode permitir ignorar as mitigações existentes através do uso da declaração '!important' em CSS.

Recommendations Atualize o Roundcube Webmail para a versão 1.5.14 ou posterior. Atualize o Roundcube Webmail para a versão 1.6.14 ou posterior.

Correção

Enumeração de Fraquezas

CWE-669

Identificadores relacionados

BDU:2026-06326

CVE-2026-35544

GHSA-XPQH-GRPW-4XMG

Produtos afetados

Red Os

Roundcube Webmail

Referências · 21

• https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0 · Correção
• https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 · Correção
• https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7 · Correção
• https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 · Nota
• https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 · Nota
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 · Nota
• https://github.com/roundcube/roundcubemail · Nota
• https://osv.dev/vulnerability/GHSA-xpqh-grpw-4xmg · Aviso do Fabricante
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-35544 · Aviso do Fabricante
• https://twitter.com/CVEnew/status/2040128729091862926 · Publicação no Twitter
• https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-35544 · Nota
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-35544 · Aviso do Fabricante
• https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 · Aviso do Fabricante
• https://nullcathedral.com/posts/2026-03-18-roundcube-round-two-three-more-sanitizer-bypasses/#css-position-fixed-important · Nota
• https://cve.org/CVERecord?id=CVE-2026-35544 · Nota de Segurança