CVE-2021-46463

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-02-15. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
75%
KEV
Not listed

Published

February 14, 2022

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Sep 4, 2026
Patch available. Sources: github_commit.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20220303-0007/
generic

Control flow hijack caused by Type Confusion of Promise object · Issue #447 · nginx/njs · GitHub

https://github.com/nginx/njs/issues/447
github_commit Patch Available

commit 6a40a85ff239 (nginx/njs)

Patch available: nginx/njs 0.9.0 (contains commit 6a40a85ff239)

https://github.com/nginx/njs/commit/6a40a85ff239497c6458c7dbef18f6a2736fe992

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
nginx—1.20.2-r2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 146 total refreshes for this CVE.

  1. 2026-09-07 15:58 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-05 21:21 UTCOSV refresh
  4. 2026-09-05 15:25 UTCEPSS rescore
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  17. 2026-08-20 22:52 UTCEPSS rescore
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  19. 2026-08-19 08:02 UTCOSV refresh
  20. 2026-08-18 13:45 UTCEPSS rescore
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  22. 2026-08-16 14:53 UTCEPSS rescore
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  24. 2026-08-15 01:27 UTCEPSS rescore
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  1. 2026-08-12 13:48 UTCEPSS rescore
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  3. 2026-08-09 13:44 UTCEPSS rescore
  4. 2026-08-08 16:34 UTCEPSS rescore
  5. 2026-08-07 16:24 UTCEPSS rescore
  6. 2026-08-06 13:44 UTCEPSS rescore
  7. 2026-08-05 19:15 UTCEPSS rescore
  8. 2026-08-04 15:06 UTCEPSS rescore
  9. 2026-08-04 10:34 UTCEPSS rescore
  10. 2026-08-04 03:57 UTCOSV refresh
  11. 2026-08-03 10:33 UTCEPSS rescore
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  22. 2026-07-23 02:06 UTCEG score recompute
  23. 2026-07-22 22:52 UTCEG score recompute
  24. 2026-07-22 14:06 UTCEPSS rescore
  25. 2026-07-21 15:22 UTCEPSS rescore
  26. 2026-07-21 15:22 UTCEPSS rescore
  27. 2026-07-20 17:05 UTCEPSS rescore
  28. 2026-07-19 14:29 UTCEPSS rescore
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  31. 2026-07-18 10:02 UTCEPSS rescore
  32. 2026-07-17 23:29 UTCOSV refresh
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  38. 2026-07-13 22:27 UTCEPSS rescore
  39. 2026-07-12 05:44 UTCEPSS rescore
  40. 2026-07-11 08:25 UTCEPSS rescore
  41. 2026-07-09 19:07 UTCEPSS rescore
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  43. 2026-07-08 15:12 UTCEPSS rescore
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  45. 2026-07-07 13:43 UTCEPSS rescore
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  48. 2026-07-06 02:21 UTCEPSS rescore
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  50. 2026-07-05 02:28 UTCEPSS rescore
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  52. 2026-07-04 06:29 UTCEPSS rescore
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  54. 2026-07-01 15:04 UTCEPSS rescore
  55. 2026-06-30 23:20 UTCEPSS rescore
  56. 2026-06-29 20:32 UTCOSV refresh
  57. 2026-06-29 14:04 UTCEPSS rescore
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  68. 2026-06-23 21:31 UTCEPSS rescore
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  70. 2026-06-22 14:24 UTCEPSS rescore
  71. 2026-06-21 14:55 UTCEPSS rescore
  72. 2026-06-21 01:58 UTCEPSS rescore
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  74. 2026-06-19 19:24 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2021-46463?
CVE-2021-46463 is a critical vulnerability published on February 14, 2022. njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njspromiseperform_then().
When was CVE-2021-46463 disclosed?
CVE-2021-46463 was first published in the National Vulnerability Database on February 14, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-46463 actively exploited?
CVE-2021-46463 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 24.7% of all scored CVEs.
What is the CVSS score of CVE-2021-46463?
CVE-2021-46463 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-46463?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46463, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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