CVE-2026-28934

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.5 from GitHub Security Advisory published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a malicious disk image may cause unexpected system termination.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 14, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
Fix named in the CVE record.
Web page

About the security content of macOS Sequoia 15.8 - Apple Support

https://support.apple.com/en-us/149043
Web page

About the security content of macOS Tahoe 26.7 - Apple Support

https://support.apple.com/en-us/149042
Web page

About the security content of macOS Golden Gate 27 - Apple Support

https://support.apple.com/en-us/149035

Vendor Advisories for CVE-2026-28934(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 / 83× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 85 are merged into the row they repeat.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 16:16 UTCEG score recompute
  4. 2026-10-11 19:58 UTCEG score recompute
  5. 2026-10-11 17:12 UTCEG score recompute
  6. 2026-10-11 14:41 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-11 05:59 UTCEG score recompute
  9. 2026-10-11 05:59 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-09 23:38 UTCEG score recompute
  12. 2026-10-09 23:38 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-08 22:52 UTCEG score recompute
  15. 2026-10-08 22:52 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  16. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-07 12:54 UTCEG score recompute
  19. 2026-10-07 12:54 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  20. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-06 11:44 UTCEG score recompute
  22. 2026-10-06 11:44 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  23. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-05 11:00 UTCEG score recompute
  25. 2026-10-05 11:00 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
Show 58 more
  1. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-04 10:14 UTCEG score recompute
  3. 2026-10-04 10:14 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  4. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-03 09:29 UTCEG score recompute
  6. 2026-10-03 09:29 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  7. 2026-10-02 07:38 UTCEG score recompute
  8. 2026-10-02 07:38 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  9. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-01 06:53 UTCEG score recompute
  11. 2026-10-01 06:53 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  12. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-09-30 06:09 UTCEG score recompute
  14. 2026-09-30 06:09 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  15. 2026-09-29 05:24 UTCEG score recompute
  16. 2026-09-29 05:24 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-09-28 04:40 UTCEG score recompute
  19. 2026-09-28 04:40 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  20. 2026-09-27 03:56 UTCEG score recompute
  21. 2026-09-27 03:56 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  23. 2026-09-26 03:11 UTCEG score recompute
  24. 2026-09-26 03:11 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  25. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  26. 2026-09-25 02:22 UTCEG score recompute
  27. 2026-09-25 02:22 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  28. 2026-09-24 01:37 UTCEG score recompute
  29. 2026-09-24 01:37 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  30. 2026-09-23 00:53 UTCEG score recompute
  31. 2026-09-23 00:53 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  32. 2026-09-22 00:09 UTCEG score recompute
  33. 2026-09-22 00:08 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  34. 2026-09-20 23:24 UTCEG score recompute
  35. 2026-09-20 23:24 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  36. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  37. 2026-09-19 22:39 UTCEG score recompute
  38. 2026-09-19 22:39 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  39. 2026-09-18 21:55 UTCEG score recompute
  40. 2026-09-18 21:55 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  41. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  42. 2026-09-17 21:11 UTCEG score recompute
  43. 2026-09-17 21:11 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  44. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  45. 2026-09-16 20:26 UTCEG score recompute
  46. 2026-09-16 20:26 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  47. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  48. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-09-15 19:40 UTCEG score recompute
  50. 2026-09-15 19:40 UTCGHSA enrichmentGHSA-29qp-f277-fch5 · GitHub CVSS 6.5
  51. 2026-09-15 17:32 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  52. 2026-09-15 17:32 UTCGHSA enrichmentGHSA-29qp-f277-fch5
  53. 2026-09-15 17:31 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  54. 2026-09-15 15:01 UTCGHSA enrichmentGHSA-29qp-f277-fch5
  55. 2026-09-14 21:32 UTCGHSA enrichmentGHSA-29qp-f277-fch5
  56. 2026-09-14 21:22 UTCNVD update
  57. 2026-09-14 21:01 UTCEG score recompute
  58. 2026-09-14 20:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-28934?
CVE-2026-28934 is a medium-severity vulnerability; its CVE record was published on September 14, 2026. A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a malicious disk image may cause unexpected system termination.
When was the CVE record for CVE-2026-28934 published?
The CVE record for CVE-2026-28934 was published on September 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 15, 2026; the record at its source may have been updated since.
Is CVE-2026-28934 actively exploited?
CVE-2026-28934 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-28934?
CVE-2026-28934 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28934?
The CVE record for CVE-2026-28934 names the fix: "This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7." The vendor advisories EchelonGraph has for CVE-2026-28934 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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