CVE-2026-20620 json
An out-of-bounds read issue was addressed with improved input validation.
published 2026-02-11 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5927
- cvss
- 7.7
- 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 12%
- public exploits
- 0
- none known
Summary
An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An attacker may be able to cause unexpected system termination or read kernel memory.
Patch / fix
- Apple macOS 14.8.4, 15.7.4, 26.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.7 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Affected products
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/126348
release-notes, vendor-advisory
-
support.apple.com
/en-us/126349
release-notes, vendor-advisory
-
support.apple.com
/en-us/126350
release-notes, vendor-advisory
Sources
- CVE List CVE-2026-20620
- NVD CVE-2026-20620
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