Device-code claim permits restricted token escalation in Psono Server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-117468
StatePUBLISHED
Assigneresaqa
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 06:17:24 UTC
Updated2026-10-27 06:17:24 UTC
DescriptionPsono 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from fdf66990-8419-4c8c-8848-ec15d75773b4

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1fdf66990-8419-4c8c-8848-ec15d75773b4Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Esaqa GmbH Psono affected 5.3.5 7.2.4 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-... fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/psono/psono-server/-/commit/19ed5a192c704fece1645d946b6... fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/psono/psono-server fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/views/de... fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4 fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Ryan Chaplin (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-29T16:10:00.000ZVulnerability reported to vendor
CNA2026-07-30T07:13:00.000ZVendor fix implemented
CNA2026-07-30T13:16:00.000ZPsono CE & EE Server 7.2.4 released

Solutions

CNA: Upgrade to Psono Server 7.2.4 or later.

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