CVE-2026-43783

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

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

A race condition was addressed with improved locking. This issue is fixed in macOS Tahoe 26.6. A malicious app may be able to gain root privileges.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 15, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

About the security content of macOS Tahoe 26.6 - Apple Support

https://support.apple.com/en-us/128067

Vendor Advisories for CVE-2026-43783(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 34× 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. 2026-09-21 03:45 UTCEG score recompute
  2. 2026-09-21 03:45 UTCGHSA enrichment
  3. 2026-09-20 20:15 UTCEPSS rescore
  4. 2026-09-20 16:16 UTCGHSA enrichment
  5. 2026-09-20 04:48 UTCGHSA enrichment
  6. 2026-09-19 17:18 UTCEG score recompute
  7. 2026-09-19 17:18 UTCGHSA enrichment
  8. 2026-09-19 05:49 UTCEG score recompute
  9. 2026-09-19 05:49 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 18:21 UTCGHSA enrichment
  12. 2026-09-18 06:52 UTCEG score recompute
  13. 2026-09-18 06:52 UTCGHSA enrichment
  14. 2026-09-17 19:31 UTCEPSS rescore
  15. 2026-09-17 19:24 UTCGHSA enrichment
  16. 2026-09-17 06:05 UTCGHSA enrichment
  17. 2026-09-16 18:36 UTCEG score recompute
  18. 2026-09-16 18:36 UTCGHSA enrichment
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 07:08 UTCEG score recompute
  21. 2026-09-16 07:08 UTCGHSA enrichment
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-15 19:39 UTCGHSA enrichment
  24. 2026-09-15 14:55 UTCGHSA enrichment
  25. 2026-09-15 04:25 UTCGHSA enrichment
Show 9 more
  1. 2026-09-15 04:04 UTCEG score recompute
  2. 2026-09-15 04:04 UTCGHSA enrichment
  3. 2026-09-14 23:22 UTCGHSA enrichment
  4. 2026-09-14 22:35 UTCEG score recompute▲ 7.80
  5. 2026-09-14 22:35 UTCGHSA enrichment
  6. 2026-09-14 22:34 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  7. 2026-09-14 21:22 UTCNVD update
  8. 2026-09-14 20:56 UTCEG score recompute
  9. 2026-09-14 20:54 UTCMITRE cvelistV5first tracked

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCandrd3v/CVE-2026-43783
    First seen Aug 13, 2026

    macOS 26.5.2< LPE PoC

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43783?
CVE-2026-43783 is a high vulnerability published on September 14, 2026. A race condition was addressed with improved locking. This issue is fixed in macOS Tahoe 26.6. A malicious app may be able to gain root privileges.
When was CVE-2026-43783 disclosed?
CVE-2026-43783 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43783 actively exploited?
CVE-2026-43783 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.2% of all scored CVEs.
What is the CVSS score of CVE-2026-43783?
CVE-2026-43783 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43783?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43783, 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

Explore the affected products and dependency analysis for CVE-2026-43783

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