CVE-2026-117468
Device-code claim permits restricted token escalation in Psono Server
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
Psono Server versions 5.3.5 through 7.2.3 used a permission class that did not enforce token write scope when claiming a device code. An authenticated remote attacker holding a restricted API key-derived session could claim an attacker-controlled device code and obtain a full read-write session valid for up to 365 days, bypassing the original token's scope and lifetime restrictions. This did not bypass two-factor authentication or directly disclose plaintext secrets.
| CWE | CWE-269 |
| Vendor | esaqa gmbh |
| Product | psono |
| Published | Oct 27, 2026 |
| Last Updated | Oct 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
esaqa GmbH / Psono
5.3.5 < 7.2.4
References
gitlab.com: https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/views/device_code_claim.py gitlab.com: https://gitlab.com/esaqa/psono/psono-server/-/commit/19ed5a192c704fece1645d946b6f4c36045bacbe gitlab.com: https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4 gitlab.com: https://gitlab.com/esaqa/psono/psono-server gitlab.com: https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117468.md
Credits
Ryan Chaplin