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CVE-2026-102414— pbkdf2 rehashes long passwords on every iteration, enabling denial of service

Quick assessment

Affected
browserify pbkdf2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pbkdf2 through 3.1.6 re-hashes passwords longer than the digest's block size on every iteration in its JavaScript fallback (lib/sync.js). A password longer than the block size (64 bytes, or 128 bytes for sha384 and sha512) is passed to HMAC as the key on every

CVSS 3.7 · Low
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I. Basic Information for CVE-2026-102414

Vulnerability Information

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Vulnerability Title
pbkdf2 rehashes long passwords on every iteration, enabling denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
pbkdf2 through 3.1.6 re-hashes passwords longer than the digest's block size on every iteration in its JavaScript fallback (lib/sync.js). A password longer than the block size (64 bytes, or 128 bytes for sha384 and sha512) is passed to HMAC as the key on every iteration, and HMAC hashes such keys in full each time. Cost is therefore O(iterations × password length), and a long password can block the event loop. The fallback is used by pbkdf2Sync and pbkdf2 on Node.js before 0.12, on Bun (1.0.0 through 1.1.34, and 1.2.6 and later), and on Deno 2.9.0 and later, because their native pbkdf2Sync fails the library's feature check. It is also used when lib/sync.js is imported directly. Node.js 0.12 and later, and browser builds (which use lib/sync-browser.js), are not affected. Applications that enforce a reasonable maximum password length are not meaningfully affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
browserify pbkdf2 0 ~ 3.1.6 -

II. Public POCs for CVE-2026-102414

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III. Intelligence Information for CVE-2026-102414

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Other References for CVE-2026-102414 (3)

IV. Related Vulnerabilities

Same vendor: browserify
Same weakness: CWE-400

V. Comments for CVE-2026-102414

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