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TI-2026-81016 Aliases CVE-2026-117469GHSA-jg7j-q6m4-7gq5

Psono file-transfer confusion allows unauthorized repository writes

Priority LOW 24CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Psono Server (CE & EE) versions from 1.0.0 before 7.2.4 do not enforce the direction of file-transfer credentials on file-repository operations. An authenticated remote attacker with read-only access to a file can 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. This lets the attacker upload or overwrite repository objects and consume storage, subject to transfer limits.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Psono 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00337 27th percentileScored 2026-11-07
Fix Fixed Psono (esaqa GmbH): 7.2.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
esaqa GmbHPsono1.0.0 to before 7.2.47.2.4Patch availableCNA
  • Psono Vendoresaqa GmbH Affected 1.0.0 to before 7.2.4 Fixed in 7.2.4 Patch available CNA

Remediation

Upgrade esaqa GmbH Psono Server to version 7.2.4 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA Psono (esaqa GmbH) Fixed in 7.2.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    esaqa Psono 7.2.4

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-81017 WebAuthn assertion replay permits second-factor bypass in Psono ServerPriority LOW 29
    • TI-2026-81015 Device-code claim permits restricted token escalation in Psono ServerPriority LOW 29
    • TI-2026-81018 User-controlled Duo host enables SSRF in Psono ServerPriority LOW 24
    Show all 5 records →

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117469
  2. 2026-10-27 Alias added: GHSA-jg7j-q6m4-7gq5
  3. 2026-10-27 Priority changed: MEDIUM → LOW
  4. 2026-11-04 CISA SSVC decision points changed

References

Patch 1

Advisory 1

Other 3

  • TI-2025-01732 Stored XSS in Psono-Client via Malicious Vault Entry URLs CVSS 4.0CRITICAL 9.3
  • TI-2026-81017 WebAuthn assertion replay permits second-factor bypass in Psono Server CVSS 3.1MEDIUM 6.5
  • TI-2026-81015 Device-code claim permits restricted token escalation in Psono Server CVSS 3.1MEDIUM 6.5
  • TI-2026-81018 User-controlled Duo host enables SSRF in Psono Server CVSS 3.1MEDIUM 5.4
  • TI-2026-81021 URL prefix handling permits API key read-scope bypass in Psono Server CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences