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    2 vulnerabilities found for python-jose by mpdavis

    CVE-2026-85394 (GCVE-0-2026-85394)

    Vulnerability from nvd – Published: 2026-09-03 18:54 – Updated: 2026-09-03 18:54
    VLAI
    Title
    python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret
    Summary
    python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    mpdavis python-jose Affected: 0 , ≤ 3.5.0 (semver)
        cpe:2.3:a:python-jose_project:python-jose:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-07-06 00:00
    Credits
    George Chen
    Show details on NVD website
    To clipboard 

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          "packageURL": "pkg:pypi/python-jose",
          "product": "python-jose",
          "vendor": "mpdavis",
          "versions": [
            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
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                  "versionEndIncluding": "3.5.0",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-07-06T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service\u0027s public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
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            "vulnIntegrityImpact": "HIGH"
          },
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        },
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            "baseScore": 9.1,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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        },
        {
          "name": "GitHub Security Advisory (GHSA-6c5p-j8vq-pqhj)",
          "tags": [
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          ],
          "url": "https://github.com/advisories/GHSA-6c5p-j8vq-pqhj"
        },
        {
          "name": "VulnCheck Advisory: python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret",
          "tags": [
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        }
      ],
      "title": "python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-85394",
    "datePublished": "2026-09-03T18:54:26.563Z",
    "dateReserved": "2026-09-03T18:10:58.475Z",
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    "state": "PUBLISHED"
  },
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    CVE-2026-85394 (GCVE-0-2026-85394)

    Vulnerability from cvelistv5 – Published: 2026-09-03 18:54 – Updated: 2026-09-03 18:54
    VLAI
    Title
    python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret
    Summary
    python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    mpdavis python-jose Affected: 0 , ≤ 3.5.0 (semver)
        cpe:2.3:a:python-jose_project:python-jose:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-07-06 00:00
    Credits
    George Chen
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:pypi/python-jose",
          "product": "python-jose",
          "vendor": "mpdavis",
          "versions": [
            {
              "lessThanOrEqual": "3.5.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:python-jose_project:python-jose:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
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          "type": "finder",
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        }
      ],
      "datePublic": "2026-07-06T00:00:00.000Z",
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        {
          "lang": "en",
          "value": "python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service\u0027s public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
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            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
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        },
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            "attackVector": "NETWORK",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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          },
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        }
      ],
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      "x_generator": {
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