CVE-2026-114475 (GCVE-0-2026-114475)

Vulnerability from cvelistv5 – Published: 2026-10-21 15:12 – Updated: 2026-10-21 15:12
VLAI
Title
Missing Authorization in hMailServer
Summary
Missing authorization in the REST role-management routes of Progressive Robot hMailServer 6.3.4 through 6.3.6 allows a remote authenticated user whose credential is confined to named domains to modify a custom role that accounts in other domains hold, and to create custom roles and delete any that no account holds. The routes that create, update and delete a custom role require the manage_roles permission, which only the serveradmin role holds; but a full-scope API key issued for named domains, and serveradmin assigned with a domain list, are serveradmin confined to those domains and hold manage_roles. The server's authorization gate did not refuse the three role routes to a confined credential and the route named no domain, so a credential issued to one tenant could raise or lower the permissions of a custom role assigned across other tenants - granting another domain's role every permission over its mailboxes and settings, or removing what it needs. A custom role may not hold administer_server, administer_domain or manage_roles, so the confined credential cannot make itself or another a server administrator by creating or rewriting a custom role.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
GitLab CNA under the mitre root
CNA scorecard B 75/100 over 297 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Progressive Robot Ltd hMailServer Affected: 6.3.4 , ≤ 6.3.6 (semver)
guessed Create a notification for this product.
Credits
Found in the hMailServer project's own security review (Progressive Robot Ltd)
Show details on NVD website
To clipboard 

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          "versions": [
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              "status": "affected",
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        }
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          "url": "https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.7"
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          "value": "Upgrade to hMailServer 6.3.7, whose authorization gate refuses the create, update and delete role routes to a credential confined to named domains, while leaving the read of roles unchanged. Until then, on a multi-tenant server, do not issue a full-scope API key - or assign serveradmin - confined to named domains to a party not trusted with the whole server; keep the REST API off (RestApiPort=0, the default) where it is not needed; and review custom roles\u0027 permissions for changes a confined credential should not have made (after upgrading as well, since an upgrade does not undo a change already made)."
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    "dateReserved": "2026-10-21T15:11:30.860Z",
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        "lastModified": "2026-10-22T16:18:19.040",
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}



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