{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "social-core",
          "vendor": "python-social-auth",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Python Social Auth is a social authentication and registration mechanism. Prior to 6.2.0, OpenIdConnectAuth in social_core/backends/open_id_connect.py uses get_and_store_nonce to place the OpenID Connect nonce in a shared OpenIdConnectAssociation table, and get_nonce and validate_claims verify only that the nonce exists and has not expired rather than binding it to the browser session and OAuth state that initiated the login. An attacker who obtains a victim\u0027s unused authorization code can start a separate login to obtain valid state for the attacker\u0027s browser, submit the victim\u0027s code with that state, and pass nonce validation because the victim nonce is globally available. With DEFAULT_USE_PKCE disabled in the default OpenIdConnectAuth configuration, the attacker can be logged in as the victim. This issue is fixed in version 6.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-384",
              "description": "CWE-384: Session Fixation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T16:44:34.337Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-h2r5-x5m7-3935",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-social-auth/social-core/security/advisories/GHSA-h2r5-x5m7-3935"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/pull/2141",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/pull/2141"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/commit/c2f2ae4663bef19ee8b07f2cf5a2344f9155d826",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/commit/c2f2ae4663bef19ee8b07f2cf5a2344f9155d826"
        },
        {
          "name": "https://github.com/python-social-auth/social-core/releases/tag/6.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-social-auth/social-core/releases/tag/6.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-h2r5-x5m7-3935",
        "discovery": "UNKNOWN"
      },
      "title": "Python Social Auth: OpenID Connect nonce is not bound to the browser session, so a stolen authorization code logs the attacker in as the victim"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115910",
    "datePublished": "2026-10-26T16:44:34.337Z",
    "dateReserved": "2026-10-23T20:21:45.106Z",
    "dateUpdated": "2026-10-26T16:44:34.337Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}