Is CVE-2023-28204 being actively exploited?

Yes. CVE-2023-28204 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on May 22, 2023.

What is the CVSS score for CVE-2023-28204?

CVE-2023-28204 has a CVSS 3.1 base score of 6.5 (MEDIUM).

CVE-2023-28204

MEDIUM · CVSS 6.5CISA KEV: actively exploitedEPSS 14.3%EU EUVD: exploited

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.

Key facts

CVSS score: 6.5 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-125
EPSS score: 14.3% (97th percentile)
In CISA KEV: Yes, added May 22, 2023
In EU EUVD: Yes (EUVD-2023-31912)
Published: June 23, 2023
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Added to the KEV catalog on May 22, 2023; federal remediation due June 12, 2023.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2023-31912 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos
apple / safari
apple / tvos
apple / watchos
webkitgtk / webkitgtk+

Certified products that may be affected

16 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Strong Customer Authentication for Apple Pay, on MacBook Air 2022 with M2 running macOS Ventura 13.3.1 - Apple Inc. - Common Criteria 2023-9-INF-4307 - active
Strong Customer Authentication for Apple Pay on Apple Watch with S8 running watchOS 9.4(watchOS 9.4 (build 20T253)) ( ANSSI-CC-2023/60) - Apple Inc. - Common Criteria ANSSI-CC-2023/60 - active
Strong Customer Authentication for Apple Pay on iPhone 14 Pro with A16 Bionic running iOS 16.4.1Version iOS 16.4.1 (build 20E252) ( ANSSI-CC-2023/59) - Apple Inc. - Common Criteria ANSSI-CC-2023/59 - active
Strong Customer Authentication for Apple Pay on Mac mini with M2 and Magic keyboard with Touch ID, running macOS Ventura 13.3.1 , macOS Ventura 13.3.1 (build 22E261) ( ANSSI-CC-2023/61) - Apple Inc. - Common Criteria ANSSI-CC-2023/61 - active
Strong Customer Authentication for Apple Pay on iPhone SE (3rd generation) with A15 Bionic running iOS 16.4.1iOS 16.4.1 (build 20E252) (ANSSI-CC-2023/58) - Apple Inc. - Common Criteria ANSSI-CC-2023/58 - active

See all 16 in the Security Certifications Explorer.

References

https://security.gentoo.org/glsa/202401-04(Third Party Advisory)
https://support.apple.com/en-us/HT213757(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT213758(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT213761(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT213762(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT213764(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/HT213765(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28204(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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