User-controlled Duo host permits authenticated SSRF in Psono Server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-117471
StatePUBLISHED
Assigneresaqa
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 06:17:25 UTC
Updated2026-10-27 06:17:25 UTC
DescriptionPsono Server CE && EE versions 0.1.0 through 7.2.3 accepted a user-controlled host when configuring a personal Duo device and passed it to the Duo client without an allowlist or explicit timeout. An authenticated remote attacker could cause the server to connect to selected hosts over HTTPS on port 443 and distinguish failure modes, providing an internal DNS and service-reachability oracle. Connections still required TLS certificate validation, and the flaw did not provide arbitrary protocol or port access. Unresponsive targets could also occupy a server worker until the operating-system timeout.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from fdf66990-8419-4c8c-8848-ec15d75773b4

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

Problem Types: CWE-918 | CWE-918 CWE-918 Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1fdf66990-8419-4c8c-8848-ec15d75773b4Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
3.1CNACVSS5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Esaqa GmbH Psono affected 0.1.0 7.2.4 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/esaqa/psono/psono-server/-/commit/4059830475744791f3d3a1daa4e... fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-... 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/-/releases/v7.2.4 fdf66990-8419-4c8c-8848-ec15d75773b4 gitlab.com
gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/serializ... 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
CNA2026-07-30T08:07:00.000ZVendor fix implemented
CNA2026-07-30T13:16:00.000ZPsono Server CE & EE 7.2.4 released

Solutions

CNA: Upgrade to Psono Server 7.2.4 or later.

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