Uncontrolled Recursion Affecting ioredis package, versions <6.0.0-beta.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-IOREDIS-19963957
- published20 Sept 2026
- disclosed17 Sept 2026
- creditWayde Shi
Introduced: 17 Sep 2026
NewCVE-2026-93435 (opens in a new tab)How to fix?
Upgrade ioredis to version 6.0.0-beta.1 or higher.
Overview
ioredis is a Redis client for Node.js.
Affected versions of this package are vulnerable to Uncontrolled Recursion in the RESP protocol parser in lib/parser.js. An attacker can crash the Node.js client process by sending crafted RESP byte streams with repeated nested array headers. The parser recurses while handling nested arrays, exhausting the V8 call stack and triggering an uncaught RangeError. In affected deployments that consume data from a malicious or compromised Redis endpoint, this terminates the process and disrupts Redis client operations.