{"affected":[{"product":"express-rate-limit","source":"CNA: GitHub_M","vendor":"express-rate-limit","versions":[{"status":"affected","version":">= 8.6.0, < 8.7.2"}]}],"cveId":"CVE-2026-126204","cwes":["CWE-682"],"description":"express-rate-limit is a basic rate-limiting middleware for Express. From 8.6.0 until 8.7.2, the built-in MemoryStore returns a Client whose mutable resetTime object is retained by middleware using skipFailedRequests or skipSuccessfulRequests. When a later request resets the client window, MemoryStore.resetClient mutates that same Date, so an earlier request that finishes or disconnects after the reset can pass the stale-window guard and decrement the current window's count. A client able to keep requests in flight across the boundary can obtain a bounded extra burst of up to one additional configured limit in the new window; the behavior does not increase the sustained rate. Stores that return a fresh Date are not affected. This issue is fixed in version 8.7.2.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":3.7,"severity":"low","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794509260963,"publishedAt":1794509260963,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/express-rate-limit/express-rate-limit/security/advisories/GHSA-j3cq-92fq-qg5f"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/express-rate-limit/express-rate-limit/pull/707"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/express-rate-limit/express-rate-limit/commit/da5b115b97dd903076d37b19437fbd71445e150b"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/express-rate-limit/express-rate-limit/releases/tag/v8.7.2"}],"remediation":[],"revision":"e949ce492fa0cdaa18937fd57c1b7955b139ca4af02b4eafe3d63459d21c3662","sources":[{"modifiedAt":1794509260963,"name":"CNA: GitHub_M","retrievedAt":1794510584194,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126204"}],"ssvc":null,"status":"published","title":"express-rate-limit skipFailedRequests / skipSuccessfulRequests: with the default MemoryStore, a request from an earlier window is still un-counted from the current window","updatedAt":1794510584194}