CVE-2026-54560 (GCVE-0-2026-54560)

Vulnerability from cvelistv5 – Published: 2026-07-15 14:40 – Updated: 2026-07-15 15:16
VLAI
Title
Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
Summary
Cloudreve is a self-hosted file management and sharing system. From 4.12.0 until 4.16.1, Cloudreve's OAuth access tokens are issued without the OAuth client_id claim, so the JWT verifier does not load token scopes into request context and RequiredScopes treats the request like non-scoped session authentication, allowing a low-scope OAuth access token to call APIs requiring higher scopes such as file, share, workflow, user setting, WebDAV account, and potentially admin scopes. This issue is fixed in version 4.16.1.
Severity
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
cloudreve cloudreve Affected: >= 4.12.0, < 4.16.1
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54560",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T15:16:30.603425Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T15:16:35.699Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "cloudreve",
          "vendor": "cloudreve",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.12.0, \u003c 4.16.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Cloudreve is a self-hosted file management and sharing system. From 4.12.0 until 4.16.1, Cloudreve\u0027s OAuth access tokens are issued without the OAuth client_id claim, so the JWT verifier does not load token scopes into request context and RequiredScopes treats the request like non-scoped session authentication, allowing a low-scope OAuth access token to call APIs requiring higher scopes such as file, share, workflow, user setting, WebDAV account, and potentially admin scopes. This issue is fixed in version 4.16.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-15T14:40:24.765Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8"
        },
        {
          "name": "https://github.com/cloudreve/cloudreve/commit/ed20843dc3df20a25fcaf6b538647e11c4d68d87",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cloudreve/cloudreve/commit/ed20843dc3df20a25fcaf6b538647e11c4d68d87"
        },
        {
          "name": "https://github.com/cloudreve/cloudreve/releases/tag/4.16.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cloudreve/cloudreve/releases/tag/4.16.1"
        }
      ],
      "source": {
        "advisory": "GHSA-vgj4-345g-jcf8",
        "discovery": "UNKNOWN"
      },
      "title": "Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54560",
    "datePublished": "2026-07-15T14:40:24.765Z",
    "dateReserved": "2026-06-15T19:04:14.457Z",
    "dateUpdated": "2026-07-15T15:16:35.699Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-54560\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-15T15:16:44.840\",\"lastModified\":\"2026-07-15T18:15:13.373\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Cloudreve is a self-hosted file management and sharing system. From 4.12.0 until 4.16.1, Cloudreve\u0027s OAuth access tokens are issued without the OAuth client_id claim, so the JWT verifier does not load token scopes into request context and RequiredScopes treats the request like non-scoped session authentication, allowing a low-scope OAuth access token to call APIs requiring higher scopes such as file, share, workflow, user setting, WebDAV account, and potentially admin scopes. This issue is fixed in version 4.16.1.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"cloudreve\",\"product\":\"cloudreve\",\"versions\":[{\"version\":\"\u003e= 4.12.0, \u003c 4.16.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L\",\"baseScore\":7.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.1,\"impactScore\":5.5}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-15T15:16:30.603425Z\",\"id\":\"CVE-2026-54560\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"references\":[{\"url\":\"https://github.com/cloudreve/cloudreve/commit/ed20843dc3df20a25fcaf6b538647e11c4d68d87\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/cloudreve/cloudreve/releases/tag/4.16.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}"
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.