high Known exploitedREV. 01
CVE-2023-43000Apple Safari and iOS — use-after-free in web content handling
macOS Ventura 13.5, iOS and iPadOS 16.6, Safari 16.6 and the 15.8.7 builds use memory after releasing it while processing crafted web content, so a single page is enough to corrupt memory in the process that renders it.
Read the risk
THE VITAL STATS- CVSS score
- 8.8/ 10 CVSS v3.1
- EPSS probability
- 4% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2025-11-05
- Added to KEV
- 2026-03-05
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- execution
- MITRE ATT&CK
- T1203
- Severity
- high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attacker needsThe user must open attacker-controlled web content in an affected browser.
Fixed inmacOS Ventura 13.5, iOS 16.6, iPadOS 16.6, Safari 16.6, iOS 15.8.7, iPadOS 15.8.7
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisorysupport.apple.comsupport.apple.com
- 04Vendor advisorysupport.apple.comsupport.apple.com
- 05Vendor advisorysupport.apple.comsupport.apple.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-24 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.