Vulnerability · Published Sep 29, 2026 · Assigned by harborist
CVE-2026-102414pbkdf2 rehashes long passwords on every iteration, enabling denial of service
Low 3.7
In plain English
A low-severity uncontrolled resource consumption in pbkdf2 from browserify. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-pbkdf2 | no fix listed | DEBIAN-CVE-2026-102414 |
| Debian:13 | node-pbkdf2 | no fix listed | DEBIAN-CVE-2026-102414 |
| Debian:14 | node-pbkdf2 | 3.1.7+~3.1.2-1 | DEBIAN-CVE-2026-102414 |
| Ubuntu:26.04:LTS | node-pbkdf2 | no fix listed | UBUNTU-CVE-2026-102414 |
| Ubuntu:26.10 | node-pbkdf2 | no fix listed | UBUNTU-CVE-2026-102414 |
| npm | pbkdf2 | 3.1.7 | GHSA-477h-4r7f-fvrx |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| browserify | pbkdf2 | 0 – through 3.1.6 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L