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TI-2026-81015 Aliases CVE-2026-117468GHSA-897w-6p63-7p9g

Device-code claim permits restricted token escalation in Psono Server

Priority LOW 29CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

Psono Server versions from 5.3.5 before 7.2.4 use a permission class that does not enforce token write scope when claiming a device code. An authenticated remote attacker holding a restricted API key-derived session can 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. The flaw does not bypass two-factor authentication or directly disclose plaintext secrets (CWE-269).

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

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00468 40th 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 GmbHPsono5.3.5 to before 7.2.47.2.4Patch availableCNA
  • Psono Vendoresaqa GmbH Affected 5.3.5 to before 7.2.4 Fixed in 7.2.4 Patch available CNA

Remediation

Upgrade esaqa GmbH Psono Server to version 7.2.4, which is the fixed version.

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-2026-81018 User-controlled Duo host enables SSRF in Psono ServerPriority LOW 24
    • TI-2026-81016 Psono file-transfer confusion allows unauthorized repository writesPriority LOW 24
    Show all 5 records →

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117468
  2. 2026-10-27 1 new reference · CNA
  3. 2026-10-27 Alias added: GHSA-897w-6p63-7p9g
  4. 2026-10-27 Priority changed: MEDIUM → LOW
  5. 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-2026-81018 User-controlled Duo host enables SSRF in Psono Server CVSS 3.1MEDIUM 5.4
  • TI-2026-81016 Psono file-transfer confusion allows unauthorized repository writes 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