CVE-2023-28204
Apple iOS, iPadOS, macOS, tvOS, watchOS, 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.
An out-of-bounds read was addressed with improved input validation. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been actively exploited.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N- security.gentoo.org/glsa/202401-04Third Party Advisory
- support.apple.com/en-us/HT213757Release NotesVendor Advisory
- support.apple.com/en-us/HT213758Release NotesVendor Advisory
- support.apple.com/en-us/HT213761Release NotesVendor Advisory
- support.apple.com/en-us/HT213762Release NotesVendor Advisory
- support.apple.com/en-us/HT213764Release NotesVendor Advisory
- support.apple.com/en-us/HT213765Release NotesVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28204US Government Resource
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1234 days
- CVSS
- 6.5 MEDIUM
- EPSS (30-day exploit probability)
- 14.3% · top 3% of all CVEs
- Weakness
- CWE-125
- Attack vector
- Network, remotely reachable
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.