CVE-2026-62662 (GCVE-0-2026-62662)

Vulnerability from cvelistv5 – Published: 2026-11-04 22:29 – Updated: 2026-11-04 22:29
VLAI
Title
Pocket ID: Client credentials grant allows any OIDC client to obtain tokens for arbitrary audiences
Summary
Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 1.11.0 until 2.10.0, createTokenFromClientCredentials in backend/internal/service/oidc_service.go accepts the client-controlled resource parameter and embeds it directly in the access token aud claim without validating that the audience is registered or that the requesting client may access it. Any authenticated OIDC client can therefore obtain a Pocket ID-signed token naming another client or an arbitrary audience. The /api/oidc/introspect endpoint cannot distinguish the unauthorized token because it treats a token as active when the introspecting client's identifier matches the attacker-selected audience. In deployments where resource servers trust Pocket ID access tokens for service-to-service authorization, this bypasses audience-based access controls and can permit unauthorized data access or actions; deployments that do not use these tokens for resource-server authorization have no immediate exploitable impact. This issue is fixed in version 2.10.0.
Severity
7.7 (High)
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-20 - Improper Input Validation
  • CWE-863 - Incorrect Authorization
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8026 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
pocket-id pocket-id Affected: >= 1.11.0, < 2.10.0
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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      "affected": [
        {
          "product": "pocket-id",
          "vendor": "pocket-id",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.11.0, \u003c 2.10.0"
            }
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        }
      ],
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          "value": "Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 1.11.0 until 2.10.0, createTokenFromClientCredentials in backend/internal/service/oidc_service.go accepts the client-controlled resource parameter and embeds it directly in the access token aud claim without validating that the audience is registered or that the requesting client may access it. Any authenticated OIDC client can therefore obtain a Pocket ID-signed token naming another client or an arbitrary audience. The /api/oidc/introspect endpoint cannot distinguish the unauthorized token because it treats a token as active when the introspecting client\u0027s identifier matches the attacker-selected audience. In deployments where resource servers trust Pocket ID access tokens for service-to-service authorization, this bypasses audience-based access controls and can permit unauthorized data access or actions; deployments that do not use these tokens for resource-server authorization have no immediate exploitable impact. This issue is fixed in version 2.10.0."
        }
      ],
      "metrics": [
        {
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
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        },
        {
          "descriptions": [
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              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-04T22:29:36.917Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pocket-id/pocket-id/security/advisories/GHSA-q4xm-p75h-h9p3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pocket-id/pocket-id/security/advisories/GHSA-q4xm-p75h-h9p3"
        },
        {
          "name": "https://github.com/pocket-id/pocket-id/pull/1520",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pocket-id/pocket-id/pull/1520"
        },
        {
          "name": "https://github.com/pocket-id/pocket-id/commit/8158452b37304115c97c61c3a56082ce938ce6f0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pocket-id/pocket-id/commit/8158452b37304115c97c61c3a56082ce938ce6f0"
        },
        {
          "name": "https://github.com/pocket-id/pocket-id/releases/tag/v2.10.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pocket-id/pocket-id/releases/tag/v2.10.0"
        }
      ],
      "source": {
        "advisory": "GHSA-q4xm-p75h-h9p3",
        "discovery": "UNKNOWN"
      },
      "title": "Pocket ID: Client credentials grant allows any OIDC client to obtain tokens for arbitrary audiences"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62662",
    "datePublished": "2026-11-04T22:29:36.917Z",
    "dateReserved": "2026-07-14T20:22:04.394Z",
    "dateUpdated": "2026-11-04T22:29:36.917Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-62662",
      "date": "2026-11-05",
      "epss": "0.00266",
      "percentile": "0.18625"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "pocket-id",
                "vendor": "pocket-id",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 1.11.0, \u003c 2.10.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 1.11.0 until 2.10.0, createTokenFromClientCredentials in backend/internal/service/oidc_service.go accepts the client-controlled resource parameter and embeds it directly in the access token aud claim without validating that the audience is registered or that the requesting client may access it. Any authenticated OIDC client can therefore obtain a Pocket ID-signed token naming another client or an arbitrary audience. The /api/oidc/introspect endpoint cannot distinguish the unauthorized token because it treats a token as active when the introspecting client\u0027s identifier matches the attacker-selected audience. In deployments where resource servers trust Pocket ID access tokens for service-to-service authorization, this bypasses audience-based access controls and can permit unauthorized data access or actions; deployments that do not use these tokens for resource-server authorization have no immediate exploitable impact. This issue is fixed in version 2.10.0."
          }
        ],
        "id": "CVE-2026-62662",
        "lastModified": "2026-11-04T23:17:56.940",
        "metrics": {
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.7,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
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                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N",
                "version": "3.0"
              },
              "exploitabilityScore": 1.3,
              "impactScore": 5.8,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
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        },
        "published": "2026-11-04T23:17:56.940",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pocket-id/pocket-id/commit/8158452b37304115c97c61c3a56082ce938ce6f0"
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          {
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            "url": "https://github.com/pocket-id/pocket-id/pull/1520"
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          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pocket-id/pocket-id/releases/tag/v2.10.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pocket-id/pocket-id/security/advisories/GHSA-q4xm-p75h-h9p3"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
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            "description": [
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                "value": "CWE-20"
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                "value": "CWE-863"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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