CVE-2023-42916
Actively exploited. CVE-2023-42916 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-04) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- An out-of-bounds read vulnerability in WebKit may disclose sensitive information when processing malicious web content.
- Who is affected
- Users of Apple iOS, iPadOS, macOS, and Safari are affected by this vulnerability.
- Urgency
- Remediation is critical due to active exploitation and the potential for sensitive data exposure.
- Action
- Update to the latest version of affected Apple products.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2023-42916: Apple Multiple Products WebKit Out-of-Bounds Read Vulnerabilitycisa-kev · 2023-12-04
External references
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[](https://www.csirts.com/cve/CVE-2023-42916)