CVE Watch29 sept 2026

CVE-2026-56734

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, during federated authentication (OAuth/OIDC/SAML), a pro

CVSS

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Sin CVSS

EPSS

0.4%

p34

KEV

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Exploit Today

0-100

Publicado: 25 sept 2026 · Última mod.: 29 sept 2026 · CWE-918

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-09-262026-10-25

Descripción técnica

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, during federated authentication (OAuth/OIDC/SAML), a profile image URL from the external identity provider is fetched without verifying the target address. An actor who controls their profile at a connected provider may cause the server to connect to internal network locations. Response timing and error patterns differ between reachable and unreachable targets, allowing internal service probing. Worker processes may be blocked for several seconds per request. Requires a configured external authentication provider where the actor can modify their profile image URL. This issue is fixed in version 7.0.2.

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