CVE-2026-43817 json
An out-of-bounds read was addressed with improved bounds checking.
published 2026-07-27 3 mo ago modified 2026-07-29 3 mo ago also EUVD-2026-49523
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 5%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Apple iOS and iPadOS 26.6
- Apple macOS 26.6
- Apple tvOS 26.6
- Apple visionOS 26.6
- Apple watchOS 26.6
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Affected products
- Apple iOS and iPadOS
- Apple macOS
- Apple tvOS
- Apple visionOS
- Apple watchOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/128066
release-notes, vendor-advisory
-
support.apple.com
/en-us/128067
release-notes, vendor-advisory
-
support.apple.com
/en-us/128068
release-notes, vendor-advisory
-
support.apple.com
/en-us/128069
release-notes, vendor-advisory
-
support.apple.com
/en-us/128070
release-notes, vendor-advisory
Sources
- CVE List CVE-2026-43817
- NVD CVE-2026-43817
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.