CVE-2026-43777

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

This issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause a denial of service.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 28, 2026
Fix named in the CVE record.
Web page

About the security content of macOS Sonoma 14.8.8 - Apple Support

https://support.apple.com/en-us/128072
Web page

About the security content of macOS Sequoia 15.7.8 - Apple Support

https://support.apple.com/en-us/128071
Web page

About the security content of macOS Tahoe 26.6 - Apple Support

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

Vendor Advisories for CVE-2026-43777(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 11× in last 7d / 60× 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.

Showing the most recent 100 of 242 refreshes on record for this CVE.

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. None are among the latest 100 rows. The 142 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-10-12 16:05 UTCEG score recompute
  4. 2026-10-11 19:47 UTCEG score recompute
  5. 2026-10-11 17:02 UTCEG score recompute
  6. 2026-10-11 14:28 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-10-07 00:11 UTCEG score recompute
  13. 2026-10-07 00:11 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-04 07:13 UTCEG score recompute
  18. 2026-10-04 07:13 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-10-02 18:25 UTCEG score recompute
  21. 2026-10-02 18:25 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-10-01 14:51 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-01 03:46 UTCEG score recompute
  25. 2026-10-01 03:46 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
Show 75 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-09-29 07:49 UTCEG score recompute
  3. 2026-09-29 07:49 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-09-28 03:28 UTCEG score recompute
  5. 2026-09-28 03:28 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  7. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  8. 2026-09-25 06:32 UTCEG score recompute
  9. 2026-09-25 06:32 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  10. 2026-09-24 09:03 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-09-23 21:58 UTCEG score recompute
  12. 2026-09-23 21:58 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  13. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  14. 2026-09-23 08:50 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  15. 2026-09-22 21:45 UTCEG score recompute
  16. 2026-09-22 21:45 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  18. 2026-09-20 00:39 UTCEG score recompute
  19. 2026-09-20 00:39 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-09-19 08:08 UTCEG score recompute
  21. 2026-09-19 08:08 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-09-18 18:23 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-09-18 02:11 UTCEG score recompute
  25. 2026-09-18 02:11 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  27. 2026-09-17 01:43 UTCEG score recompute
  28. 2026-09-17 01:43 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  30. 2026-09-16 05:58 UTCEG score recompute
  31. 2026-09-16 05:58 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  33. 2026-09-15 08:55 UTCEG score recompute
  34. 2026-09-15 08:55 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-09-14 15:33 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  36. 2026-09-14 02:27 UTCEG score recompute
  37. 2026-09-14 02:27 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  39. 2026-09-13 15:21 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-09-13 03:49 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-09-12 16:42 UTCEG score recompute
  42. 2026-09-12 16:42 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  44. 2026-09-12 05:37 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-09-11 18:28 UTCEG score recompute
  46. 2026-09-11 18:28 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  48. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  49. 2026-09-11 07:22 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-09-10 20:16 UTCEG score recompute
  51. 2026-09-10 20:16 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  53. 2026-09-10 07:53 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-09-09 08:09 UTCEG score recompute
  55. 2026-09-09 08:09 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  57. 2026-09-07 20:58 UTCEG score recompute
  58. 2026-09-07 20:58 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  60. 2026-09-06 18:24 UTCEG score recompute
  61. 2026-09-06 18:24 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  62. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  63. 2026-09-06 07:19 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-09-05 19:12 UTCEG score recompute
  65. 2026-09-05 19:12 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-09-05 05:36 UTCEG score recompute
  67. 2026-09-05 05:36 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-09-04 12:11 UTCEG score recompute
  69. 2026-09-04 12:11 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  71. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  72. 2026-09-01 22:55 UTCEG score recompute
  73. 2026-09-01 22:55 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5
  74. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  75. 2026-09-01 00:53 UTCGHSA enrichmentGHSA-j2pr-cr54-m722 · GitHub severity HIGH · GitHub CVSS 7.5

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43777?
CVE-2026-43777 is a high-severity vulnerability; its CVE record was published on July 27, 2026. This issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause a denial of service.
When was the CVE record for CVE-2026-43777 published?
The CVE record for CVE-2026-43777 was published on July 27, 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 July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-43777 actively exploited?
CVE-2026-43777 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43777?
CVE-2026-43777 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43777?
The CVE record for CVE-2026-43777 names the fix: "This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6." The vendor advisories EchelonGraph has for CVE-2026-43777 are linked in the Vendor Advisories panel on this page.

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