CVE-2023-32373: Apple Multiple Products WebKit Use-After-Free Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 32 days before the CVE record was published.
- How likely is exploitation in the next 30 days?
- 12.2%
EPSS score, percentile 96.1 of all scored records
- How severe?
- 8.8 High
CVSS v3.1 base score, from CISA's enrichment of the record
- What should I do?
CISA deadline . Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- before 13.4
- before 16.5
- before 9.5
- before 15.7
- before 16.5
- before 16.5
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: .
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://support.apple.com/HT213757
- https://support.apple.com/HT213758
- https://support.apple.com/HT213761
- https://support.apple.com/HT213762
- https://support.apple.com/HT213764
- https://support.apple.com/HT213765
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | before 13.4 |
| Status | Versions |
|---|---|
| Affected | before 16.5 |
| Status | Versions |
|---|---|
| Affected | before 9.5 |
| Status | Versions |
|---|---|
| Affected | before 15.7 |
| Status | Versions |
|---|---|
| Affected | before 16.5 |
| Status | Versions |
|---|---|
| Affected | before 16.5 |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
Apple iOS, iPadOS, macOS, tvOS, watchOS, 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.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2023-32373 to its Known Exploited Vulnerabilities (KEV) catalog on 22 May 2023.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 12 Jun 2023.
- The CVE record was published on 23 Jun 2023, 32 days after it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 8.8 (High), taken from CISA's enrichment of the record.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 12.2% (percentile 96.1), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
A use-after-free issue was addressed with improved memory management. 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 maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-416: Use After Free
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record published | |
| CVE record last updated |
References
- support.apple.com
- support.apple.com
- support.apple.com
- support.apple.com
- support.apple.com
- support.apple.com
- security.gentoo.org
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