CVE-2026-6647

{
  "etk_id": "ETK-2026-2924",
  "cve_id": "CVE-2026-6647",
  "display_id": "CVE-2026-6647",
  "ghsa_id": "GHSA-rxrw-f2xj-7fjx",
  "euvd_id": "EUVD-2026-112401",
  "status": "published",
  "anchor_state": "anchored",
  "title": "OAuth token revocation bypass in WSO2 Identity Server",
  "summary": "WSO2 Identity Server can fail to revoke OAuth tokens when username case handling differs between the user store and identity database. An attacker holding an access or refresh token for a mixed-case username may retain access until that token expires. The issue requires a case-insensitive user store paired with a case-sensitive identity-data database.",
  "mitigation": "Align username case-sensitivity settings between the user store and identity-data database to avoid the affected mismatch. Until a vendor fix is identified, reduce token lifetimes and review or restrict active tokens for mixed-case usernames.",
  "vendor": "WSO2",
  "product": "WSO2 Identity Server",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 7.2.0, < 7.2.0.21"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "7.2.0.21"
      ],
      "package_name": "WSO2 Identity Server",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 7.0.385, < 7.0.385.17"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "7.0.385.17"
      ],
      "package_name": "org.wso2.carbon.identity.inbound.auth.oauth2:org.wso2.carbon.identity.oauth",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 59.909318383333336,
  "t0_at": "2026-10-28T19:21:35.702000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-28T19:21:35.702000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-28T19:21:35.702000+00:00",
      "url": "https://github.com/advisories/GHSA-rxrw-f2xj-7fjx"
    }
  }
}