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Vulnerability record · CVE-2021-46463 · published 14 February 2022

CVE-2021-46463: F5 njs type confusion vulnerability

F5 · Njs

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njs_promise_perform_then().

9.8 CVSS 3.1 Critical EPSS 1.7% · top 24.1% CWE-843 · Type confusion
9.8CVSS 3.1 base score, v2 7.5
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njs_promise_perform_then().

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nginx/njs/commit/6a40a85ff239497c6458c7dbef18f6a2736fe992 PatchThird Party Advisory
https://github.com/nginx/njs/issues/447 ExploitIssue TrackingPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220303-0007/ Third Party Advisory
https://github.com/nginx/njs/commit/6a40a85ff239497c6458c7dbef18f6a2736fe992 PatchThird Party Advisory
https://github.com/nginx/njs/issues/447 ExploitIssue TrackingPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220303-0007/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-46463), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.