CVE-2026-43816

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

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, 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%CVSS: 5.5Exploit: None knownExposed: 0

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

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 29, 2026

Advisory Details (5)

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

About the security content of visionOS 26.6 - Apple Support

https://support.apple.com/en-us/128070
generic

About the security content of tvOS 26.6 - Apple Support

https://support.apple.com/en-us/128069
generic

About the security content of watchOS 26.6 - Apple Support

https://support.apple.com/en-us/128068
generic

About the security content of macOS Tahoe 26.6 - Apple Support

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

About the security content of iOS 26.6 and iPadOS 26.6 - Apple Support

https://support.apple.com/en-us/128066

Vendor Advisories for CVE-2026-43816(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 16× in last 7d / 85× 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.

Showing the most recent 100 of 101 total refreshes for this CVE.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:46 UTCEG score recompute
  3. 2026-08-29 23:46 UTCGHSA enrichment
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 21:19 UTCEG score recompute
  6. 2026-08-27 21:19 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 22:58 UTCEG score recompute
  9. 2026-08-26 22:58 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-26 00:36 UTCEG score recompute
  12. 2026-08-26 00:36 UTCGHSA enrichment
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-25 01:48 UTCEG score recompute
  15. 2026-08-25 01:48 UTCGHSA enrichment
  16. 2026-08-24 03:26 UTCGHSA enrichment
  17. 2026-08-23 04:51 UTCEG score recompute
  18. 2026-08-23 04:51 UTCGHSA enrichment
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-22 06:29 UTCEG score recompute
  21. 2026-08-22 06:29 UTCGHSA enrichment
  22. 2026-08-21 23:49 UTCEPSS rescore
  23. 2026-08-21 08:08 UTCEG score recompute
  24. 2026-08-21 08:08 UTCGHSA enrichment
  25. 2026-08-20 22:55 UTCEPSS rescore
Show 75 more
  1. 2026-08-20 09:46 UTCEG score recompute
  2. 2026-08-20 09:46 UTCGHSA enrichment
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-19 11:25 UTCEG score recompute
  5. 2026-08-19 11:25 UTCGHSA enrichment
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-18 13:04 UTCEG score recompute
  8. 2026-08-18 13:04 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 13:44 UTCGHSA enrichment
  11. 2026-08-16 15:23 UTCEG score recompute
  12. 2026-08-16 15:23 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 17:02 UTCEG score recompute
  16. 2026-08-15 17:02 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 18:40 UTCEG score recompute
  19. 2026-08-14 18:40 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 20:13 UTCGHSA enrichment
  22. 2026-08-12 21:52 UTCEG score recompute
  23. 2026-08-12 21:52 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-11 23:30 UTCEG score recompute
  26. 2026-08-11 23:30 UTCGHSA enrichment
  27. 2026-08-11 13:43 UTCEPSS rescore
  28. 2026-08-11 01:09 UTCEG score recompute
  29. 2026-08-11 01:09 UTCGHSA enrichment
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-10 02:48 UTCEG score recompute
  32. 2026-08-10 02:48 UTCGHSA enrichment
  33. 2026-08-09 13:46 UTCEPSS rescore
  34. 2026-08-09 04:27 UTCEG score recompute
  35. 2026-08-09 04:27 UTCGHSA enrichment
  36. 2026-08-08 16:37 UTCEPSS rescore
  37. 2026-08-08 06:06 UTCEG score recompute
  38. 2026-08-08 06:06 UTCGHSA enrichment
  39. 2026-08-07 07:45 UTCEG score recompute
  40. 2026-08-07 07:45 UTCGHSA enrichment
  41. 2026-08-06 13:46 UTCEPSS rescore
  42. 2026-08-06 09:24 UTCEG score recompute
  43. 2026-08-06 09:24 UTCGHSA enrichment
  44. 2026-08-05 19:17 UTCEPSS rescore
  45. 2026-08-05 11:03 UTCEG score recompute
  46. 2026-08-05 11:02 UTCGHSA enrichment
  47. 2026-08-04 15:10 UTCEPSS rescore
  48. 2026-08-04 12:37 UTCEG score recompute
  49. 2026-08-04 12:37 UTCGHSA enrichment
  50. 2026-08-04 10:38 UTCEPSS rescore
  51. 2026-08-03 12:38 UTCEG score recompute
  52. 2026-08-03 12:38 UTCGHSA enrichment
  53. 2026-08-03 10:36 UTCEPSS rescore
  54. 2026-08-02 14:08 UTCEG score recompute
  55. 2026-08-02 14:08 UTCGHSA enrichment
  56. 2026-08-02 02:27 UTCEPSS rescore
  57. 2026-08-01 15:46 UTCEG score recompute
  58. 2026-08-01 15:46 UTCGHSA enrichment
  59. 2026-08-01 04:16 UTCEPSS rescore
  60. 2026-07-31 17:25 UTCGHSA enrichment
  61. 2026-07-30 19:03 UTCEG score recompute
  62. 2026-07-30 19:03 UTCGHSA enrichment
  63. 2026-07-30 16:28 UTCEPSS rescore
  64. 2026-07-30 01:30 UTCEPSS rescore
  65. 2026-07-29 20:40 UTCGHSA enrichment
  66. 2026-07-29 19:07 UTCEG score recompute
  67. 2026-07-29 19:07 UTCGHSA enrichment
  68. 2026-07-28 20:45 UTCGHSA enrichment
  69. 2026-07-28 19:27 UTCGHSA enrichment
  70. 2026-07-28 18:24 UTCEG score recompute▲ 5.50
  71. 2026-07-28 18:24 UTCGHSA enrichment
  72. 2026-07-28 18:22 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  73. 2026-07-28 15:36 UTCEPSS rescore
  74. 2026-07-27 21:19 UTCNVD update
  75. 2026-07-27 20:29 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43816?
CVE-2026-43816 is a medium vulnerability published on July 27, 2026. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
When was CVE-2026-43816 disclosed?
CVE-2026-43816 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43816 actively exploited?
CVE-2026-43816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 92.4% of all scored CVEs.
What is the CVSS score of CVE-2026-43816?
CVE-2026-43816 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43816?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43816, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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