CVE-2026-86950

CRITICALPre-NVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-09-29), indicating real-world exploitation has been confirmed by US federal agencies. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa-adp, cisa_kev, epss, ghsa
Trending — KEV-added this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 1.2%CVSS: 8.8Exploit: cisa kev · ssvc active · public exploitExposed services: Not assessed

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

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.

CVSS v3
8.8
EG Score
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.
EPSS PROB
1.2%
EPSS %ILE
68th
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 28, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Sep 28, 2026
No patch confirmed yet.
generic

About the security content of macOS Sequoia 15.8.1 - Apple Support

https://support.apple.com/en-us/149229
generic

About the security content of macOS Tahoe 26.7.1 - Apple Support

https://support.apple.com/en-us/149228
generic

About the security content of iOS 26.7.1 and iPadOS 26.7.1 - Apple Support

https://support.apple.com/en-us/149226

Vendor Advisories for CVE-2026-86950(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 57× in last 7d / 57× 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. 2026-10-04 09:49 UTCGHSA enrichment
  2. 2026-10-04 05:51 UTCGHSA enrichment
  3. 2026-10-04 01:54 UTCGHSA enrichment
  4. 2026-10-03 21:57 UTCGHSA enrichment
  5. 2026-10-03 18:00 UTCEG score recompute
  6. 2026-10-03 17:59 UTCGHSA enrichment
  7. 2026-10-03 14:01 UTCGHSA enrichment
  8. 2026-10-03 10:04 UTCGHSA enrichment
  9. 2026-10-03 06:07 UTCGHSA enrichment
  10. 2026-10-03 02:10 UTCGHSA enrichment
  11. 2026-10-02 22:13 UTCGHSA enrichment
  12. 2026-10-02 18:15 UTCGHSA enrichment
  13. 2026-10-02 18:15 UTCGHSA enrichment
  14. 2026-10-02 18:15 UTCEG score recompute
  15. 2026-10-02 18:15 UTCGHSA enrichment
  16. 2026-10-02 14:18 UTCGHSA enrichment
  17. 2026-10-02 10:18 UTCGHSA enrichment
  18. 2026-10-02 06:21 UTCGHSA enrichment
  19. 2026-10-02 02:24 UTCGHSA enrichment
  20. 2026-10-01 22:27 UTCEG score recompute
  21. 2026-10-01 22:26 UTCGHSA enrichment
  22. 2026-10-01 19:50 UTCEPSS rescore
  23. 2026-10-01 18:29 UTCGHSA enrichment
  24. 2026-10-01 17:21 UTCGHSA enrichment
  25. 2026-10-01 15:39 UTCGHSA enrichment
Show 32 more
  1. 2026-10-01 11:41 UTCGHSA enrichment
  2. 2026-10-01 07:41 UTCGHSA enrichment
  3. 2026-10-01 03:44 UTCGHSA enrichment
  4. 2026-09-30 23:47 UTCGHSA enrichment
  5. 2026-09-30 19:50 UTCGHSA enrichment
  6. 2026-09-30 15:53 UTCEG score recompute
  7. 2026-09-30 15:53 UTCGHSA enrichment
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-30 11:56 UTCGHSA enrichment
  10. 2026-09-30 07:59 UTCGHSA enrichment
  11. 2026-09-30 04:01 UTCGHSA enrichment
  12. 2026-09-30 00:10 UTCGHSA enrichment
  13. 2026-09-29 20:12 UTCGHSA enrichment
  14. 2026-09-29 16:13 UTCEG score recompute
  15. 2026-09-29 16:13 UTCGHSA enrichment
  16. 2026-09-29 15:23 UTCGHSA enrichment
  17. 2026-09-29 15:09 UTCEG score recompute
  18. 2026-09-29 15:09 UTCGHSA enrichment
  19. 2026-09-29 14:49 UTCEG score recompute
  20. 2026-09-29 14:49 UTCGHSA enrichment
  21. 2026-09-29 14:18 UTCEG score recompute▲ 0.20
  22. 2026-09-29 14:18 UTCGHSA enrichment
  23. 2026-09-29 14:17 UTCCISA KEV update
  24. 2026-09-29 08:21 UTCGHSA enrichment
  25. 2026-09-29 07:29 UTCGHSA enrichment
  26. 2026-09-29 04:31 UTCGHSA enrichment
  27. 2026-09-29 04:00 UTCEG score recompute
  28. 2026-09-29 04:00 UTCGHSA enrichment
  29. 2026-09-28 19:48 UTCEG score recompute▲ 8.80
  30. 2026-09-28 19:46 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  31. 2026-09-28 19:28 UTCEG score recompute
  32. 2026-09-28 19:26 UTCMITRE cvelistV5first tracked

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCmsuiche/hotcell
    First seen Oct 1, 2026

    Runtime exploit monitor for Apple document/image pipelines (iOS/macOS) — EXPMON concept: Frida agent + behavioral rules. First target: the CVE-2026-86950 glyph chain.

    Open source ↗
  • GitHub PoCDeAurity/CVE-2026-86950-POC
    First seen Sep 29, 2026

    Out-of-bounds Write (CWE-787)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-86950?
CVE-2026-86950 is a critical vulnerability published on September 28, 2026. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have…
When was CVE-2026-86950 disclosed?
CVE-2026-86950 was first published on September 28, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86950 actively exploited?
Yes. CISA added CVE-2026-86950 to the Known Exploited Vulnerabilities catalog on September 29, 2026, affecting Apple Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2026-86950?
CVE-2026-86950 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2026-86950?
CVE-2026-86950 affects Apple Multiple Products.
How do I remediate CVE-2026-86950?
No fix for CVE-2026-86950 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-86950 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-86950

Explore →

Is Your Infrastructure Affected by CVE-2026-86950?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs