CVE-2026-43817

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 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
5.5MEDIUMmedium 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
4th
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 (5)

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

About the security content of visionOS 26.6 - Apple Support

https://support.apple.com/en-us/128070
Web page

About the security content of tvOS 26.6 - Apple Support

https://support.apple.com/en-us/128069
Web page

About the security content of watchOS 26.6 - Apple Support

https://support.apple.com/en-us/128068
Web page

About the security content of macOS Tahoe 26.6 - Apple Support

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

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-2026-43817(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 9× 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 99 of 190 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 91 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% · 4th percentile
  2. 2026-10-12 16:05 UTCEG score recompute
  3. 2026-10-11 19:47 UTCEG score recompute
  4. 2026-10-11 17:02 UTCEG score recompute
  5. 2026-10-11 14:28 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-07 00:12 UTCEG score recompute
  11. 2026-10-07 00:12 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-04 07:15 UTCEG score recompute
  16. 2026-10-04 07:15 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-02 18:26 UTCEG score recompute
  19. 2026-10-02 18:26 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-10-01 03:49 UTCEG score recompute
  22. 2026-10-01 03:49 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-09-29 07:50 UTCEG score recompute
  25. 2026-09-29 07:50 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
Show 74 more
  1. 2026-09-28 03:30 UTCEG score recompute
  2. 2026-09-28 03:30 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  3. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-09-25 06:42 UTCEG score recompute
  6. 2026-09-25 06:42 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  7. 2026-09-23 22:00 UTCEG score recompute
  8. 2026-09-23 22:00 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  9. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-09-22 21:46 UTCEG score recompute
  11. 2026-09-22 21:46 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  12. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-09-20 00:45 UTCEG score recompute
  14. 2026-09-20 00:45 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  15. 2026-09-19 00:11 UTCEG score recompute
  16. 2026-09-19 00:11 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-09-18 02:23 UTCEG score recompute
  19. 2026-09-18 02:23 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  20. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-09-17 04:33 UTCEG score recompute
  22. 2026-09-17 04:33 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  24. 2026-09-16 06:47 UTCEG score recompute
  25. 2026-09-16 06:47 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  27. 2026-09-15 09:00 UTCEG score recompute
  28. 2026-09-15 09:00 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  29. 2026-09-14 00:27 UTCEG score recompute
  30. 2026-09-14 00:27 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  31. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  32. 2026-09-13 02:41 UTCEG score recompute
  33. 2026-09-13 02:41 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  34. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  35. 2026-09-12 04:54 UTCEG score recompute
  36. 2026-09-12 04:54 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  38. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  39. 2026-09-11 06:56 UTCEG score recompute
  40. 2026-09-11 06:56 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  41. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  42. 2026-09-10 08:01 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  43. 2026-09-09 08:13 UTCEG score recompute
  44. 2026-09-09 08:13 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  45. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  46. 2026-09-07 20:59 UTCEG score recompute
  47. 2026-09-07 20:59 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  48. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  49. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  50. 2026-09-06 08:04 UTCEG score recompute
  51. 2026-09-06 08:04 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  52. 2026-09-05 10:15 UTCEG score recompute
  53. 2026-09-05 10:15 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  54. 2026-09-04 12:16 UTCEG score recompute
  55. 2026-09-04 12:16 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  56. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  57. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  58. 2026-09-01 22:56 UTCEG score recompute
  59. 2026-09-01 22:56 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  60. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  61. 2026-09-01 00:55 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  62. 2026-08-30 21:41 UTCEG score recompute
  63. 2026-08-30 21:41 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  64. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  65. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  66. 2026-08-29 23:46 UTCEG score recompute
  67. 2026-08-29 23:46 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  68. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  69. 2026-08-27 23:59 UTCEG score recompute
  70. 2026-08-27 23:59 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  71. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  72. 2026-08-27 02:13 UTCEG score recompute
  73. 2026-08-27 02:13 UTCGHSA enrichmentGHSA-46ww-xphq-j8cv · GitHub CVSS 5.5
  74. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 7th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43817?
CVE-2026-43817 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 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 the CVE record for CVE-2026-43817 published?
The CVE record for CVE-2026-43817 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-2026-43817 actively exploited?
CVE-2026-43817 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-2026-43817?
CVE-2026-43817 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43817?
The CVE record for CVE-2026-43817 names the fix: "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." The vendor advisories EchelonGraph has for CVE-2026-43817 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-43817

Explore →

Is Your Infrastructure Affected by CVE-2026-43817?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs