CVE-2026-117468 (GCVE-0-2026-117468)

Vulnerability from cvelistv5 – Published: 2026-10-27 05:41 – Updated: 2026-10-27 05:59
VLAI
Title
Device-code claim permits restricted token escalation in Psono Server
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-269 - Improper Privilege Management
Assigner
esaqa CNA under the ENISA root
CNA scorecard – unranked: 5 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
esaqa GmbH Psono Affected: 5.3.5 , < 7.2.4 (semver)
guessed Create a notification for this product.
Date Public
2026-10-27 00:00
Credits
Ryan Chaplin
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Psono Server Community Edition",
            "Psono Server Enterprise Edition"
          ],
          "product": "Psono",
          "programFiles": [
            "psono/restapi/views/device_code_claim.py",
            "psono/restapi/views/device_code_token.py"
          ],
          "repo": "https://gitlab.com/esaqa/psono/psono-server",
          "vendor": "esaqa GmbH",
          "versions": [
            {
              "lessThan": "7.2.4",
              "status": "affected",
              "version": "5.3.5",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ryan Chaplin"
        }
      ],
      "datePublic": "2026-10-27T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003ePsono 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\u0027s scope and lifetime restrictions. This did not bypass two-factor authentication or directly disclose plaintext secrets.\u003c/p\u003e"
            }
          ],
          "value": "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\u0027s scope and lifetime restrictions. This did not bypass two-factor authentication or directly disclose plaintext secrets."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A restricted, short-lived API key session could be escalated to a full read-write session lasting up to 365 days, enabling unauthorized modification of encrypted secrets and shares."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "CWE-269 Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T05:59:08.920Z",
        "orgId": "fdf66990-8419-4c8c-8848-ec15d75773b4",
        "shortName": "esaqa"
      },
      "references": [
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/views/device_code_claim.py"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.com/esaqa/psono/psono-server/-/commit/19ed5a192c704fece1645d946b6f4c36045bacbe"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://gitlab.com/esaqa/psono/psono-server"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117468.md"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpgrade to Psono Server 7.2.4 or later.\u003c/p\u003e"
            }
          ],
          "value": "Upgrade to Psono Server 7.2.4 or later."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-29T16:10:00.000Z",
          "value": "Vulnerability reported to vendor"
        },
        {
          "lang": "en",
          "time": "2026-07-30T07:13:00.000Z",
          "value": "Vendor fix implemented"
        },
        {
          "lang": "en",
          "time": "2026-07-30T13:16:00.000Z",
          "value": "Psono CE \u0026 EE Server 7.2.4 released"
        }
      ],
      "title": "Device-code claim permits restricted token escalation in Psono Server",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "fdf66990-8419-4c8c-8848-ec15d75773b4",
    "assignerShortName": "esaqa",
    "cveId": "CVE-2026-117468",
    "datePublished": "2026-10-27T05:41:30.742Z",
    "dateReserved": "2026-10-27T05:33:18.001Z",
    "dateUpdated": "2026-10-27T05:59:08.920Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-117468",
      "date": "2026-10-28",
      "epss": "0.00468",
      "percentile": "0.40373"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "modules": [
                  "Psono Server Community Edition",
                  "Psono Server Enterprise Edition"
                ],
                "product": "Psono",
                "programFiles": [
                  "psono/restapi/views/device_code_claim.py",
                  "psono/restapi/views/device_code_token.py"
                ],
                "repo": "https://gitlab.com/esaqa/psono/psono-server",
                "vendor": "esaqa GmbH",
                "versions": [
                  {
                    "lessThan": "7.2.4",
                    "status": "affected",
                    "version": "5.3.5",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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\u0027s scope and lifetime restrictions. This did not bypass two-factor authentication or directly disclose plaintext secrets."
          }
        ],
        "id": "CVE-2026-117468",
        "lastModified": "2026-10-27T15:00:49.240",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 3.6,
              "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-27T06:17:24.527",
        "references": [
          {
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "url": "https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117468.md"
          },
          {
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "url": "https://gitlab.com/esaqa/psono/psono-server"
          },
          {
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "url": "https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/views/device_code_claim.py"
          },
          {
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "url": "https://gitlab.com/esaqa/psono/psono-server/-/commit/19ed5a192c704fece1645d946b6f4c36045bacbe"
          },
          {
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "url": "https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4"
          }
        ],
        "sourceIdentifier": "fdf66990-8419-4c8c-8848-ec15d75773b4",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-269"
              }
            ],
            "source": "fdf66990-8419-4c8c-8848-ec15d75773b4",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.