{"api_version":"1","generated_at":"2026-09-17T23:17:23+00:00","cve":"CVE-2026-90997","urls":{"html":"https://cve.report/CVE-2026-90997","api":"https://cve.report/api/cve/CVE-2026-90997.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90997","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90997"},"summary":{"title":"Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch","description":"A flaw was found in Keycloak. When deployed in stateless mode with MySQL or MariaDB, a mismatch in row-count semantics between the database driver and Keycloak's application logic allows an attacker to bypass replay protection. This vulnerability enables an attacker who intercepts single-use security artifacts, such as JWT client assertions, DPoP proofs, or one-time password (TOTP) codes, to replay them. Successful exploitation grants unauthorized access to the token endpoint or login flow.","state":"PUBLISHED","assigner":"redhat","published_at":"2026-09-17 19:17:06","updated_at":"2026-09-17 19:17:06"},"problem_types":["CWE-294","CWE-294 CWE-294 Authentication Bypass by Capture-replay"],"metrics":[{"version":"3.1","source":"secalert@redhat.com","type":"Primary","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"baseScore":7.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"url":"https://github.com/keycloak/keycloak","name":"https://github.com/keycloak/keycloak","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://access.redhat.com/security/cve/cve-2026-90997","name":"https://access.redhat.com/security/cve/cve-2026-90997","refsource":"secalert@redhat.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90997","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90997","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Keycloak","product":"Keycloak","version":"affected 26.7.0 26.7.4 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://github.com/keycloak/keycloak","defaultStatus":"unaffected","packageName":"keycloak-services","product":"Keycloak","vendor":"Keycloak","versions":[{"lessThan":"26.7.4","status":"affected","version":"26.7.0","versionType":"semver"}]}],"descriptions":[{"lang":"en","value":"A flaw was found in Keycloak. When deployed in stateless mode with MySQL or MariaDB, a mismatch in row-count semantics between the database driver and Keycloak's application logic allows an attacker to bypass replay protection. This vulnerability enables an attacker who intercepts single-use security artifacts, such as JWT client assertions, DPoP proofs, or one-time password (TOTP) codes, to replay them. Successful exploitation grants unauthorized access to the token endpoint or login flow."}],"metrics":[{"cvssV3_1":{"baseScore":7.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-294","description":"CWE-294 Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-17T18:56:17.887Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/cve-2026-90997"},{"tags":["product"],"url":"https://github.com/keycloak/keycloak"}],"title":"Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch"}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2026-90997","datePublished":"2026-09-17T18:47:34.059Z","dateReserved":"2026-09-14T14:53:37.815Z","dateUpdated":"2026-09-17T18:56:17.887Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 19:17:06","lastModifiedDate":"2026-09-17 19:17:06","problem_types":["CWE-294","CWE-294 CWE-294 Authentication Bypass by Capture-replay"],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90997","Ordinal":"1","Title":"Keycloak: Replay protection bypass leads to unauthorized access ","CVE":"CVE-2026-90997","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90997","Ordinal":"1","NoteData":"A flaw was found in Keycloak. When deployed in stateless mode with MySQL or MariaDB, a mismatch in row-count semantics between the database driver and Keycloak's application logic allows an attacker to bypass replay protection. This vulnerability enables an attacker who intercepts single-use security artifacts, such as JWT client assertions, DPoP proofs, or one-time password (TOTP) codes, to replay them. Successful exploitation grants unauthorized access to the token endpoint or login flow.","Type":"Description","Title":"Keycloak: Replay protection bypass leads to unauthorized access "}]}}}