File-transfer type confusion permits unauthorized repository writes in Psono Server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-117469
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 (CE & EE) versions 1.0.0 through 7.2.3 did not enforce the direction of file-transfer credentials on file-repository operations. An authenticated remote attacker with read-only access to a file could present a download transfer to the upload endpoint, obtain a signed upload URL for an attacker-selected object key, and append a chunk to the owner's file. Exploitation could upload or overwrite repository objects and consume storage, subject to transfer size, chunk-count, and lifetime limits.

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:N/I:L/A:L

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

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

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Esaqa GmbH Psono affected 1.0.0 7.2.4 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/esaqa/psono/psono-server/-/commit/64753b19bd8d03cfbed20db575f... 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
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
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
CNA2026-07-30T07:32:00.000ZVendor 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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