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    CVE-2026-56726

    Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, this vulnerability breaks normal ticket isolation boundaries between agents. Any authenticated agent, even one with no active tickets assigned to them, can view the titles, status, labels, and URL links of GitHub/GitLab issues attached to any ticket in the system. This allows an internal user to systematically view GitHub/GitLab issue data linked by other agents or administrators across the organization by simply querying random or sequential ticket IDs. This vulnerability is fixed in 7.0.2.

    Published:Sep 25, 2026
    Last Modified:Sep 26, 2026
    EPS:Sep 25, 2026
    EPSS Score:
    CVSS Score:5.1

    Affected Products

    Vendor
    Zammad
    Product
    Zammad

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-102345 (CVSS 5.1) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the new Vue-based ticket i…
    CVE-2026-102490 (CVSS 9.4) — Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file …
    CVE-2026-102489 (CVSS 9.4) — Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code executi…
    CVE-2026-63208 (CVSS 5.1) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when a Microsoft Graph req…
    CVE-2026-63006 (CVSS 5.3) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, attacker-controlled HTML i…
    CVE-2026-63204 (CVSS 2.3) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, an authenticated user with…
    CVE-2026-61855 (CVSS 5.3) — Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, under certain conditio…
    CVE-2026-84461 (CVSS 6.9) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step …
    CVE-2026-63207 (CVSS 6.9) — Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, an authenticated admin…
    CVE-2026-84465 (CVSS 7.1) — Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the dig…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High