CVE-2023-32409: Apple Multiple Products WebKit Sandbox Escape 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?
- 16.5%
EPSS score, percentile 97 of all scored records
- How severe?
- 8.6 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 an unspecified vulnerability that can allow a remote attacker to break out of the Web Content sandbox. 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-2023-32409 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 8.6 (High), taken from CISA's enrichment of the record.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 16.5% (percentile 97), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.
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
The issue was addressed with improved bounds checks. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.8 and iPadOS 15.7.8, Safari 16.5, iOS 16.5 and iPadOS 16.5. A remote attacker may be able to break out of Web Content sandbox. 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.
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
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