CVE-2026-107585

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Source

https://cve.org/CVERecord?id=CVE-2026-107585

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107585.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-107585

Published

2026-10-08T15:11:19Z

Modified

2026-10-28T02:30:21Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

Allocation of Resources Without Limits or Throttling in hMailServer

Details

Uncontrolled eviction in the pending sign-in tables of the REST API in Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to make other users' OpenID Connect, SAML and passkey sign-ins fail. The routes that start a single sign-on and hand out a passkey sign-in challenge are reached without authentication and stored pending state in bounded tables that dropped their oldest entry when full, whoever had started it. An attacker who starts sign-ins a few times a second (about a hundred a second for passkeys) pushes every other user's pending sign-in out of the table before that user's browser returns, denying single sign-on and passkey sign-in for as long as the requests continue.

Database specific

{
    "cna_assigner":  "GitLab",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107585.json"
}

References

Affected packages

Git / gitlab.com/hmailserver/hmailserver

Affected ranges

Type

GIT

Repo

https://gitlab.com/hmailserver/hmailserver

Events

Introduced

51e2dbda08d6aa7fcda5a48f1af05221809f78be

Fixed

e3c448aa66fc310b74d076884d54fae951296915

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "6.3.4"
                },
                {
                    "fixed":  "6.3.6"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

v6.*

v6.3.4

v6.3.5

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107585.json"