CVE-2022-43286

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-10-29. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njs_json_parse_iterator_call at njs_json.c.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
55.5%
KEV
Not listed

Published

October 28, 2022

Last Modified

May 7, 2025

Advisory Details (2)

Auto-updated May 28, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic🟡 PoC Available

illegal memory copy in njs_json_parse_iterator_call of njs_json.c:1008 · Issue #480 · nginx/njs · GitHub

https://github.com/nginx/njs/issues/480
github_commit Patch Available

commit 2ad0ea24a58d (nginx/njs)

Patch available: nginx/njs 0.9.0 (contains commit 2ad0ea24a58d)

https://github.com/nginx/njs/commit/2ad0ea24a58d570634e09c2e58c3b314505eaa6a

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 44× 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.

  1. 2026-07-15 16:56 UTCEPSS rescore
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  1. 2026-06-27 03:07 UTCEPSS rescore
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  27. 2026-06-11 04:09 UTCOSV refresh
  28. 2026-06-10 22:17 UTCEPSS rescore
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  50. 2026-05-29 13:43 UTCEPSS rescore
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  61. 2026-05-25 13:01 UTCEG score recompute
  62. 2026-05-25 13:01 UTCGHSA enrichment
  63. 2026-05-24 05:02 UTCOSV refresh

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-43286?
CVE-2022-43286 is a critical vulnerability published on October 28, 2022. Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njsjsonparseiteratorcall at njs_json.c.
When was CVE-2022-43286 disclosed?
CVE-2022-43286 was first published in the National Vulnerability Database on October 28, 2022, with the most recent update on May 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-43286 actively exploited?
CVE-2022-43286 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-43286?
CVE-2022-43286 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2022-43286?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-43286, 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.

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