Allocation of Resources Without Limits or Throttling Affecting pbkdf2 package, versions <3.1.7
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Start learning- Snyk IDSNYK-JS-PBKDF2-20251013
- published29 Sept 2026
- disclosed29 Sept 2026
- creditSteve Thomas (Sc00bz), Jordan Harband (ljharb)
Introduced: 29 Sep 2026
NewCVE-2026-102414 (opens in a new tab)How to fix?
Upgrade pbkdf2 to version 3.1.7 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the pbkdf2 function in lib/sync.js, which passes the raw password to createHmac on every PBKDF2 iteration. Because HMAC rehashes any key longer than the digest's block size (per RFC 2104), a long password causes O(iterations × password_length) hash operations instead of O(iterations), allowing an attacker to trigger disproportionate CPU consumption by supplying a long password.
Note: This is only exploitable via the pure-JS synchronous path used on Node.js < 0.12, Bun, Deno, or through direct imports of pbkdf2/lib/sync.