What’s Vulnerable › Vulnerabilities
CVE-2020-9857
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-10-27 · updated 2026-06-17
Description
An issue existed in the parsing of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.5, Security Update 2020-003 Mojave, Security Update 2020-003 High Sierra. A malicious website may be able to exfiltrate autofilled data in Safari.
Affected products
- macOS: before 10.15.5 — fixed in 10.15.5
How to fix
Upgrade to a fixed version: macOS 10.15.5. Check the vendor advisory for mitigations.
References
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