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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21713

⇱ NVD - CVE-2026-21713

  1. Vulnerabilities

CVE-2026-21713 Detail

Awaiting Enrichment

This CVE record has been marked for NVD enrichment efforts.

Description

A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values. Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision. This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases HackerOne

Weakness Enumeration

CWE-ID CWE Name Source
CWE-208 Observable Timing Discrepancy CISA-ADP  

Change History

4 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:18:57 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-03-30T19:45:13.027379Z","id":"CVE-2026-21713","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by HackerOne 6/17/2026 6:18:57 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"nodejs","product":"node","defaultStatus":"unaffected","versions":[{"version":"20.20.1","lessThanOrEqual":"20.20.1","versionType":"semver","status":"affected"},{"version":"22.22.1","lessThanOrEqual":"22.22.1","versionType":"semver","status":"affected"},{"version":"24.14.0","lessThanOrEqual":"24.14.0","versionType":"semver","status":"affected"},{"version":"25.8.1","lessThanOrEqual":"25.8.1","versionType":"semver","status":"affected"},{"version":"4.0","lessThan":"4.*","versionType":"semver","status":"affected"},{"version":"5.0","lessThan":"5.*","versionType":"semver","status":"affected"},{"version":"6.0","lessThan":"6.*","versionType":"semver","status":"affected"},{"version":"7.0","lessThan":"7.*","versionType":"semver","status":"affected"},{"version":"8.0","lessThan":"8.*","versionType":"semver","status":"affected"},{"version":"9.0","lessThan":"9.*","versionType":"semver","status":"affected"},{"version":"10.0","lessThan":"10.*","versionType":"semver","status":"affected"},{"version":"11.0","lessThan":"11.*","versionType":"semver","status":"affected"},{"version":"12.0","lessThan":"12.*","versionType":"semver","status":"affected"},{"version":"13.0","lessThan":"13.*","versionType":"semver","status":"affected"},{"version":"14.0","lessThan":"14.*","versionType":"semver","status":"affected"},{"version":"15.0","lessThan":"15.*","versionType":"semver","status":"affected"},{"version":"16.0","lessThan":"16.*","versionType":"semver","status":"affected"},{"version":"17.0","lessThan":"17.*","versionType":"semver","status":"affected"},{"version":"18.0","lessThan":"18.*","versionType":"semver","status":"affected"},{"version":"19.0","lessThan":"19.*","versionType":"semver","status":"affected"}]}]

CVE Modified by CISA-ADP 5/10/2026 10:16:47 AM

Action Type Old Value New Value
Added CWE 
CWE-208

New CVE Received from HackerOne 3/30/2026 4:16:19 PM

Action Type Old Value New Value
Added Description 
A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.

Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.

This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
Added CVSS V3 
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Added Reference 
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases

Quick Info

CVE Dictionary Entry:
CVE-2026-21713
NVD Published Date:
03/30/2026
NVD Last Modified:
06/17/2026
Source:
HackerOne