CVE-2026-102414: Pbkdf2 Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-477h-4r7f-fvrx
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CVSS 3.7
CWE-400
Published
Advisory Summary

CVE-2026-102414 is a MODERATE (CVSS 3.7) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Pbkdf2 libraries in the npm ecosystem. The issue involves pbkdf2 rehashes long passwords on every iteration, enabling denial of service. Remediation is available by upgrading affected packages to version 3.1.7.

CVE-2026-102414 at a Glance

CVE Identifier CVE-2026-102414
GHSA Identifier GHSA-477h-4r7f-fvrx
Severity MODERATE
CVSS v3.1 Base Score 3.7
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Pbkdf2
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 3.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-102414

To remediate this vulnerability, upgrade all affected Pbkdf2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

pbkdf2 fixed: 3.1.7 
npm install pbkdf2@3.1.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls pbkdf2

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-102414, inspect your project dependencies using npm:

npm ls pbkdf2

Analyze the terminal output to locate any version of Pbkdf2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.7), your application is affected.

Note: The npm ls pbkdf2 command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Pbkdf2, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary This is the same bug as Django had (CVE-2013-1443). ### Details A long password can cause a DoS because it is not using cached HMAC, length limits, or pre-hashing passwords longer than the block size of the hash function as per HMAC spec. This line of code hashes the full password each iteration: https://github.com/browserify/pbkdf2/blob/1c3b1f526b052a29b3b42120c9821895772df7e8/lib/sync.js#L60 Also see https://github.com/browserify/pbkdf2/issues/82 ### PoC The first key will take a lot longer to generate when not using the native code and uses code from `/lib/sync.js` (ie when this if statement is true): https://github.com/browserify/pbkdf2/blob/1c3b1f526b052a29b3b42120c9821895772df7e8/index.js#L33-L37 ```js var pbkdf2 = require('pbkdf2'); var createHash = require('create-hash'); var pw = ".".repeat(1048576); // 1 MiB var t0 = performance.now(); var key1 = pbkdf2.pbkdf2Sync(pw, "salt", 1000, 32, "sha256"); var t1 = performance.now(); pw = createHash('sha256').update(pw).digest(); // HMAC specification for keys larger than block size var key2 = pbkdf2.pbkdf2Sync(pw, "salt", 1000, 32, "sha256"); var t2 = performance.now(); console.log("First took: " + (t1 - t0)); console.log("Second took: " + (t2 - t1)); console.log("Generated keys:"); console.log(key1); console.log(key2); ``` ### Impact DoS

CVE-2026-102414 Affected Pbkdf2 Versions

1 component(s)
Fixed Versions:
3.1.7
Product / Package Ecosystem Affected Versions Fixed Version
pbkdf2
npm/pbkdf2
npm
< 3.1.7
3.1.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/browserify/pbkdf2/security/advisories/GHSA-477h-4r7f-fvrx
NVD — CVE-2026-102414 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102414
Pbkdf2 Source Repository REPOSITORY
https://github.com/browserify/pbkdf2/issues/82
Security Fix Commit FIX COMMIT
https://github.com/browserify/pbkdf2/commit/493d8d8ff437f680338bf7397398fda884ad462e
Pbkdf2 Source Repository REPOSITORY
https://github.com/browserify/pbkdf2

Frequently Asked Questions

What is CVE-2026-102414?
CVE-2026-102414 is a security vulnerability in Pbkdf2 involving pbkdf2 rehashes long passwords on every iteration, enabling denial of service under CWE-400: Uncontrolled Resource Consumption.
Which Pbkdf2 versions are affected?
Affected versions include releases prior to 3.1.7 across affected packages: pbkdf2.
What version fixes CVE-2026-102414?
Upgrading to 3.1.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pbkdf2 affected?
Yes, pbkdf2 is affected in releases prior to 3.1.7. Upgrade your dependency to 3.1.7 or later.
What is the CVSS score of CVE-2026-102414?
CVE-2026-102414 has a CVSS v3.1 base score of 3.7 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-102414?
CVE-2026-102414 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2026-102414?
Run the dependency tree command: 'npm ls pbkdf2'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-477h-4r7f-fvrx",
  "modified" : "2026-10-06T13:40:10Z",
  "published" : "2026-10-06T13:40:10Z",
  "aliases" : [ "CVE-2026-102414" ],
  "summary" : "pbkdf2 rehashes long passwords on every iteration, enabling denial of service",
  "details" : "### Summary\nThis is the same bug as Django had (CVE-2013-1443).\n\n### Details\nA long password can cause a DoS because it is not using cached HMAC, length limits, or pre-hashing passwords longer than the block size of the hash function as per HMAC spec. This line of code hashes the full password each iteration: https://github.com/browserify/pbkdf2/blob/1c3b1f526b052a29b3b42120c9821895772df7e8/lib/sync.js#L60\n\nAlso see https://github.com/browserify/pbkdf2/issues/82\n\n### PoC\nThe first key will take a lot longer to generate when not using the native code and uses code from `/lib/sync.js` (ie when this if statement is true):\nhttps://github.com/browserify/pbkdf2/blob/1c3b1f526b052a29b3b42120c9821895772df7e8/index.js#L33-L37\n\n```js\nvar pbkdf2 = require('pbkdf2');\nvar createHash = require('create-hash');\nvar pw = \".\".repeat(1048576); // 1 MiB\n\nvar t0 = performance.now();\nvar key1 = pbkdf2.pbkdf2Sync(pw, \"salt\", 1000, 32, \"sha256\");\nvar t1 = performance.now();\npw = createHash('sha256').update(pw).digest(); // HMAC specification for keys larger than block size\nvar key2 = pbkdf2.pbkdf2Sync(pw, \"salt\", 1000, 32, \"sha256\");\nvar t2 = performance.now();\n\nconsole.log(\"First took:  \" + (t1 - t0));\nconsole.log(\"Second took: \" + (t2 - t1));\nconsole.log(\"Generated keys:\");\nconsole.log(key1);\nconsole.log(key2);\n```\n\n### Impact\nDoS",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "pbkdf2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.1.6"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/browserify/pbkdf2/security/advisories/GHSA-477h-4r7f-fvrx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102414"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/browserify/pbkdf2/issues/82"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/browserify/pbkdf2/commit/493d8d8ff437f680338bf7397398fda884ad462e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/browserify/pbkdf2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-06T13:40:10Z",
    "nvd_published_at" : "2026-09-29T04:17:55Z"
  }
}