CISA KEV entry
CVE-2023-42916Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability
Apple Multiple Products. Added to the CISA Known Exploited Vulnerabilities catalogue on 4 December 2023.
Data status: a source is stale
Last synced CISA catalogue version 2026.11.04 (released 4 November 2026) 1,768 entries Updated manually
- Date added
- 2023-12-04
- Federal due date
- 2023-12-25 21 days after it was added; passed at the sync of 2026-11-05
- Known ransomware use
- Unknown
- Forensic triage (BOD 26-04)
- No
- CVSS
- 6.5 Medium CVSS 3.1, scored by nvd@nist.gov
- EPSS
- 17.82% percentile 97.1, scored 2026-11-04
- CISA SSVC
- Exploitation active, automatable no, technical impact partial
- NVD status
- Analyzed published 2023-11-30, 4 days before the KEV listing
BOD 26-04 remediation window
With CISA's SSVC answers for this CVE (automatable: no, technical impact: partial), BOD 26-04 Table 1 gives 14 days on a publicly exposed asset (row 4) and 14 days on an asset that is not publicly exposed (row 12) S06. The catalogue due date, 21 days after the date added, was set before BOD 26-04 took effect on 10 June 2026 S06. The directive binds US federal civilian executive branch agencies only.
What CISA says
Short description
Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Required action
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Notes
https://support.apple.com/en-us/HT214031, https://support.apple.com/en-us/HT214032, https://support.apple.com/en-us/HT214033 ; https://nvd.nist.gov/vuln/detail/CVE-2023-42916
CWE in the catalogue
CWE-125
Official links
- CISA KEV catalogue entry cisa.gov
- NVD record nvd.nist.gov
Vendor advisory and patch links
References NVD tags Vendor Advisory or Patch, exactly as NVD lists them.
- https://support.apple.com/en-us/HT214031 Vendor Advisory
- https://support.apple.com/en-us/HT214032 Vendor Advisory
- https://support.apple.com/en-us/HT214033 Vendor Advisory
- https://support.apple.com/kb/HT214033 Vendor Advisory
- https://support.apple.com/kb/HT214034 Vendor Advisory
- https://support.apple.com/kb/HT214062 Vendor Advisory
Links in CISA's notes
NVD details
- CWE (NVD)
- CWE-125 by nvd@nist.gov
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N- CVSS versions in NVD
- V31
- Last modified in NVD
- 2026-06-17T06:24:49.510
Where each value comes from
| Field | Source | Fetched, UTC | State |
|---|---|---|---|
| Catalogue fields | CISA KEV JSON, version 2026.11.04 | 2026-11-05 11:38 | current |
| NVD published, status, CVSS, CWE, vendor links | NVD CVE API 2.0; CVSS: NVD (nvd@nist.gov) | 2026-11-03 12:37 | current at 2026-11-05 11:38 |
| EPSS | FIRST EPSS API, scores of 2026-11-04 | 2026-11-05 11:38 | current |
| CISA SSVC | CISA ADP (via NVD), record of 2023-12-02 | 2026-11-03 12:37 | current |
This product uses data from the NVD API but is not endorsed or certified by the NVD. CISA does not endorse Sysprobs. Methodology.