CVE-2026-34718

Zammad improperly neutralizes of script-related HTML tags in ticket articles

CVSS 5.3 MEDIUMEPSS 0.1%CWE-80

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 5.3EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

08 abr 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the HTML sanitizer for ticket articles was missing proper sanitization of data: ... URI schemes, resulting in storing such malicious content in the database of the Zammad instance. The Zammad GUI is rendering this content, due to applied CSP rules no harm was done by e.g., clicking such a link. This vulnerability is fixed in 7.0.1 and 6.5.4.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Produtos afetados

zammad · zammad

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Referências

https://github.com/zammad/zammad/security/advisories/GHSA-c2cf-9fc7-jhf3