CVE-2026-43774

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
5.5EG
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

An out-of-bounds read was addressed with improved bounds checking. 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 access sensitive user data.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.2% × 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
0.2%
EPSS %ILE
5th
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

July 27, 2026

Last Modified

July 29, 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-2026-43774(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 / 53× 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 182 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 82 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 0.2% · 5th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 5th 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 0.2% · 5th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-07 01:26 UTCEG score recompute
  13. 2026-10-07 01:26 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-04 07:16 UTCEG score recompute
  18. 2026-10-04 07:16 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  19. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-02 18:27 UTCEG score recompute
  21. 2026-10-02 18:27 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-01 03:51 UTCEG score recompute
  24. 2026-10-01 03:51 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
Show 75 more
  1. 2026-09-29 07:51 UTCEG score recompute
  2. 2026-09-29 07:51 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  3. 2026-09-28 03:31 UTCEG score recompute
  4. 2026-09-28 03:31 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  5. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-09-25 06:48 UTCEG score recompute
  8. 2026-09-25 06:48 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  9. 2026-09-23 22:03 UTCEG score recompute
  10. 2026-09-23 22:03 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  11. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-09-22 21:47 UTCEG score recompute
  13. 2026-09-22 21:47 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  14. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-09-20 00:53 UTCEG score recompute
  16. 2026-09-20 00:53 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-18 09:46 UTCEG score recompute
  19. 2026-09-18 09:46 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  20. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-09-17 09:10 UTCEG score recompute
  22. 2026-09-17 09:10 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-09-16 06:15 UTCEG score recompute
  25. 2026-09-16 06:15 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  27. 2026-09-14 16:14 UTCEG score recompute
  28. 2026-09-14 16:14 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  29. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  30. 2026-09-13 15:58 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  31. 2026-09-12 15:42 UTCEG score recompute
  32. 2026-09-12 15:42 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  33. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  34. 2026-09-11 15:26 UTCEG score recompute
  35. 2026-09-11 15:26 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  37. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  38. 2026-09-10 10:13 UTCEG score recompute
  39. 2026-09-10 10:13 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  40. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  41. 2026-09-09 08:16 UTCEG score recompute
  42. 2026-09-09 08:16 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  43. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  44. 2026-09-07 23:41 UTCEG score recompute
  45. 2026-09-07 23:41 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  46. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  47. 2026-09-06 23:25 UTCEG score recompute
  48. 2026-09-06 23:25 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  49. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  50. 2026-09-05 19:14 UTCEG score recompute
  51. 2026-09-05 19:14 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  52. 2026-09-04 12:17 UTCEG score recompute
  53. 2026-09-04 12:17 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  54. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  55. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  56. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  57. 2026-09-01 00:58 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  58. 2026-08-31 00:04 UTCEG score recompute
  59. 2026-08-31 00:04 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  60. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  61. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  62. 2026-08-29 23:48 UTCEG score recompute
  63. 2026-08-29 23:48 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  64. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  65. 2026-08-28 04:37 UTCEG score recompute
  66. 2026-08-28 04:37 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  67. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  68. 2026-08-27 04:18 UTCEG score recompute
  69. 2026-08-27 04:18 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  70. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  71. 2026-08-26 03:58 UTCEG score recompute
  72. 2026-08-26 03:58 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5
  73. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  74. 2026-08-25 03:42 UTCEG score recompute
  75. 2026-08-25 03:42 UTCGHSA enrichmentGHSA-jg6m-x829-8jxm · GitHub CVSS 5.5

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43774?
CVE-2026-43774 is a medium-severity vulnerability; its CVE record was published on July 27, 2026. An out-of-bounds read was addressed with improved bounds checking. 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 access sensitive user data.
When was the CVE record for CVE-2026-43774 published?
The CVE record for CVE-2026-43774 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 29, 2026; the record at its source may have been updated since.
Is CVE-2026-43774 actively exploited?
CVE-2026-43774 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43774?
CVE-2026-43774 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43774?
The CVE record for CVE-2026-43774 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-2026-43774 are linked in the Vendor Advisories panel on this page.

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