{"id":"CVE-2021-29469","aliases":["CLSA-2026-1776818209","DEBIAN-CVE-2021-29469","EUVD-2021-0743","GHSA-35q2-47q7-3pc3","UBUNTU-CVE-2021-29469"],"status":"published","title":"Potential exponential regex in monitor mode","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01629,"percentile":0.76358,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2021-04-23T18:10:15Z","modified":"2026-10-23T18:04:49Z","fixes":[{"ecosystem":"npm","package":"redis","fixed_in":["3.1.1"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:npm","package":"redis","fixed_in":["2.8.0-tuxcare.1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"node-redis","fixed_in":["3.0.2+~cs5.18.1-3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-redis","fixed_in":["3.0.2+~cs5.18.1-3"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-redis","fixed_in":["3.0.2+~cs5.18.1-3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.0"},{"fixed":"3.1.1"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.8.0-tuxcare.0"},{"fixed":"2.8.0-tuxcare.1"}]}],"versions":["2.8.0"]},{"source":"osv","ecosystem":"Debian:12","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.2+~cs5.18.1-3"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.2+~cs5.18.1-3"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.2+~cs5.18.1-3"}]}]},{"source":"osv","ecosystem":"npm","package":"redis","ranges":[{"type":"SEMVER","events":[{"introduced":"2.6.0"},{"fixed":"3.1.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.1-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.1-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.0-1","3.0.2-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.2+~cs5.18.1-3","3.1.2+~cs6.15.1-1"]}],"products":[{"vendor":"noderedis","product":"node-redis"},{"vendor":"redis.js","product":"redis"}],"references":[{"url":"https://github.com/NodeRedis/node-redis/security/advisories/GHSA-35q2-47q7-3pc3","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/NodeRedis/node-redis/commit/2d11b6dc9b9774464a91fb4b448bad8bf699629e","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/NodeRedis/node-redis/releases/tag/v3.1.1","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web","report"]},{"url":"https://security.netapp.com/advisory/ntap-20210611-0010/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29469","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-35q2-47q7-3pc3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-29469","tags":["advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20210611-0010","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-29469","tags":["report"]},{"url":"https://github.com/NodeRedis/node-redis/issues/1569","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-29469","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-29469","title":"Potential exponential regex in monitor mode","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:10:15Z","modified":"2024-08-03T22:11:05.198Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-0743","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:10:15Z","modified":"2024-08-03T22:11:05Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T03:24:44.540278Z"}],"ghsa":[{"id":"GHSA-35q2-47q7-3pc3","title":"Node-Redis potential exponential regex in monitor mode","description":"### Impact\nWhen a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service.\n\n### Patches\nThe problem was fixed in commit [`2d11b6d`](https://github.com/NodeRedis/node-redis/commit/2d11b6dc9b9774464a91fb4b448bad8bf699629e) and was released in version `3.1.1`.\n\n### References\n#1569 (GHSL-2021-026)","status":"published","published":"2021-04-27T15:56:03Z","modified":"2023-01-29T05:02:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:25.064927Z"}],"nvd":[{"id":"CVE-2021-29469","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:15:08.303Z","modified":"2026-06-17T03:47:42.277Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-29469","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:15:08.303Z","modified":"2026-10-20T10:57:28.079145724Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-29469","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:15:08.303Z","modified":"2026-10-23T18:04:49.964658192Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"GHSA-35q2-47q7-3pc3","title":"Node-Redis potential exponential regex in monitor mode","description":"### Impact\nWhen a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service.\n\n### Patches\nThe problem was fixed in commit [`2d11b6d`](https://github.com/NodeRedis/node-redis/commit/2d11b6dc9b9774464a91fb4b448bad8bf699629e) and was released in version `3.1.1`.\n\n### References\n#1569 (GHSL-2021-026)","status":"published","published":"2021-04-27T15:56:03Z","modified":"2026-07-08T06:28:35.315015325Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"id":"UBUNTU-CVE-2021-29469","description":"Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.","status":"published","published":"2021-04-23T18:15:00Z","modified":"2025-10-24T04:50:16Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"CLSA-2026-1776818209","title":"TuxCare security update for redis (1 CVE)","description":"TuxCare rebuilt redis to address 1 CVE. Fixed in 2.8.0-tuxcare.1.","status":"published","published":"2026-08-04T14:52:27Z","modified":"2026-10-15T09:45:47.161194009Z","updated_at":"2026-11-02T15:43:44.384419Z"}]}}