{"id":"CVE-2019-10157","aliases":["EUVD-2019-0509","GHSA-68hw-vfh7-xvg8"],"status":"published","title":"Forced Logout in keycloak-connect","description":"It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.","severity":{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00208,"percentile":0.10947,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287","CWE-345"],"published":"2019-06-12T13:48:42Z","modified":"2026-10-24T10:30:48Z","fixes":[{"ecosystem":"npm","package":"keycloak-connect","fixed_in":["4.8.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"keycloak-connect","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.3"}]}]},{"source":"osv","ecosystem":"npm","package":"keycloak-connect","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.8.3"}]}]}],"products":[{"vendor":"keycloak","product":"keycloak"},{"vendor":"red hat","product":"keycloak"},{"vendor":"redhat","product":"keycloak"},{"vendor":"redhat","product":"single_sign-on"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10157","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Vendor Advisory","report","web"]},{"url":"http://www.securityfocus.com/bid/108734","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10157","tags":["advisory"]},{"url":"https://github.com/keycloak/keycloak-nodejs-connect/commit/55e54b55d05ba636bc125a8f3d39f0052d13f8f6","tags":["web"]},{"url":"https://snyk.io/vuln/SNYK-JS-KEYCLOAKNODEJSCONNECT-449920","tags":["web"]},{"url":"https://www.npmjs.com/advisories/978","tags":["web"]},{"url":"https://github.com/advisories/GHSA-68hw-vfh7-xvg8"}],"sources":{"cve":[{"id":"CVE-2019-10157","description":"It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.","status":"published","published":"2019-06-12T13:48:42Z","modified":"2024-08-04T22:10:10.057Z","cvss":[{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:20:19.056416Z"}],"euvd":[{"id":"EUVD-2019-0509","description":"It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.","status":"published","published":"2019-06-12T13:48:42Z","modified":"2024-08-04T22:10:10Z","cvss":[{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T02:40:53.61807Z"}],"ghsa":[{"id":"GHSA-68hw-vfh7-xvg8","title":"Forced Logout in keycloak-connect","description":"Versions of `keycloak-connect` prior to 4.4.0 are vulnerable to Forced Logout. The package fails to validate JWT signatures on the `/k_logout` route, allowing attackers to logout users and craft malicious JWTs with NBF values that prevent user access indefinitely.\n\n\n## Recommendation\n\nUpgrade to version 4.4.0 or later.","status":"published","published":"2019-06-13T20:38:09Z","modified":"2023-02-01T05:02:20Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-287","CWE-345"],"updated_at":"2026-11-02T14:36:30.61364Z"}],"nvd":[{"id":"CVE-2019-10157","description":"It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.","status":"published","published":"2019-06-12T14:29:02.963Z","modified":"2026-06-17T02:10:22.633Z","cvss":[{"version":"3.0","score":4.7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-345","CWE-287"],"updated_at":"2026-11-02T14:05:16.285679Z"}],"osv":[{"id":"CVE-2019-10157","description":"It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.","status":"published","published":"2019-06-12T14:29:02.963Z","modified":"2026-10-24T10:30:48.35608857Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:10.051046Z"},{"id":"GHSA-68hw-vfh7-xvg8","title":"Forced Logout in keycloak-connect","description":"Versions of `keycloak-connect` prior to 4.4.0 are vulnerable to Forced Logout. The package fails to validate JWT signatures on the `/k_logout` route, allowing attackers to logout users and craft malicious JWTs with NBF values that prevent user access indefinitely.\n\n\n## Recommendation\n\nUpgrade to version 4.4.0 or later.","status":"published","published":"2019-06-13T20:38:09Z","modified":"2023-11-08T04:00:41.814123Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-287","CWE-345"],"updated_at":"2026-11-02T15:46:39.266402Z"}]}}