CVE-2023-28205: in the CISA KEV catalogue
Apple Multiple Products WebKit Use-After-Free Vulnerability. CISA added CVE-2023-28205 to the Known Exploited Vulnerabilities catalogue on 2023-04-10 with a default due date of 2023-05-01. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Apple iOS, iPadOS, macOS, and Safari WebKit contain a use-after-free vulnerability that leads to code execution 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. (CISA description)
- Vendor / product
- Apple Multiple Products
- CWE
- CWE-416
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 27%, percentile 98 (scored 2026-11-03)
EPSS puts about 27 in 100 odds (27%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 98% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2023-28205 in the CISA KEV catalogue?
Yes. CISA added CVE-2023-28205 (Apple Multiple Products WebKit Use-After-Free Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2023-04-10. CISA's default due date for it is 2023-05-01.
Is CVE-2023-28205 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2023-28205. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2023-28205?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2023-28205