CVE-2026-28933

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

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

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
25
EG Risk 25/100CISA 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 14, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

About the security content of macOS Sonoma 14.8.8 - Apple Support

https://support.apple.com/en-us/128072
generic

About the security content of macOS Sequoia 15.7.8 - Apple Support

https://support.apple.com/en-us/128071
generic

About the security content of macOS Tahoe 26.6 - Apple Support

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

Vendor Advisories for CVE-2026-28933(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 19× in last 7d / 62× 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. 2026-10-05 00:29 UTCEG score recompute
  2. 2026-10-05 00:29 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 01:20 UTCEG score recompute
  5. 2026-10-04 01:20 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 02:26 UTCEG score recompute
  8. 2026-10-03 02:26 UTCGHSA enrichment
  9. 2026-10-02 03:22 UTCEG score recompute
  10. 2026-10-02 03:22 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 04:15 UTCEG score recompute
  13. 2026-10-01 04:15 UTCGHSA enrichment
  14. 2026-09-30 15:03 UTCEPSS rescore
  15. 2026-09-30 05:23 UTCEG score recompute
  16. 2026-09-30 05:23 UTCGHSA enrichment
  17. 2026-09-29 06:24 UTCEG score recompute
  18. 2026-09-29 06:24 UTCGHSA enrichment
  19. 2026-09-28 13:51 UTCEPSS rescore
  20. 2026-09-28 07:32 UTCEG score recompute
  21. 2026-09-28 07:32 UTCGHSA enrichment
  22. 2026-09-27 08:40 UTCEG score recompute
  23. 2026-09-27 08:40 UTCGHSA enrichment
  24. 2026-09-26 15:58 UTCEPSS rescore
  25. 2026-09-26 09:48 UTCEG score recompute
Show 37 more
  1. 2026-09-26 09:47 UTCGHSA enrichment
  2. 2026-09-26 00:26 UTCEPSS rescore
  3. 2026-09-25 10:54 UTCEG score recompute
  4. 2026-09-25 10:53 UTCGHSA enrichment
  5. 2026-09-24 11:35 UTCEG score recompute
  6. 2026-09-24 11:35 UTCGHSA enrichment
  7. 2026-09-23 12:43 UTCEG score recompute
  8. 2026-09-23 12:43 UTCGHSA enrichment
  9. 2026-09-22 13:50 UTCEG score recompute
  10. 2026-09-22 13:50 UTCGHSA enrichment
  11. 2026-09-21 14:58 UTCEG score recompute
  12. 2026-09-21 14:58 UTCGHSA enrichment
  13. 2026-09-20 20:15 UTCEPSS rescore
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-20 16:04 UTCGHSA enrichment
  16. 2026-09-19 17:09 UTCEG score recompute
  17. 2026-09-19 17:09 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 19:27 UTCEPSS rescore
  20. 2026-09-18 18:17 UTCEG score recompute
  21. 2026-09-18 18:17 UTCGHSA enrichment
  22. 2026-09-17 19:30 UTCEPSS rescore
  23. 2026-09-17 19:24 UTCGHSA enrichment
  24. 2026-09-16 18:31 UTCEG score recompute
  25. 2026-09-16 18:31 UTCGHSA enrichment
  26. 2026-09-16 14:08 UTCEPSS rescore
  27. 2026-09-16 05:15 UTCEPSS rescore
  28. 2026-09-15 19:39 UTCEG score recompute
  29. 2026-09-15 19:39 UTCGHSA enrichment
  30. 2026-09-15 17:32 UTCGHSA enrichment
  31. 2026-09-15 16:43 UTCEG score recompute▲ 5.50
  32. 2026-09-15 16:43 UTCGHSA enrichment
  33. 2026-09-15 16:42 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  34. 2026-09-15 14:58 UTCGHSA enrichment
  35. 2026-09-14 21:22 UTCNVD update
  36. 2026-09-14 20:58 UTCEG score recompute
  37. 2026-09-14 20:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-28933?
CVE-2026-28933 is a medium vulnerability published on September 14, 2026. A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
When was CVE-2026-28933 disclosed?
CVE-2026-28933 was first published 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-2026-28933 actively exploited?
CVE-2026-28933 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-28933?
CVE-2026-28933 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28933?
No fix for CVE-2026-28933 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-2026-28933 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-28933

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