CVE-2026-28871
MEDIUMCVSS 4.3/10EPSS 0.28%
Last modified
CVE-2026-28871 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
Description
A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site scripting attack.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Safari | < 26.4 |
| Apple | Ipados | < 18.7.7 |
| Apple | Ipados | >= 26.0, < 26.4 |
| Apple | Iphone Os | < 18.7.7 |
| Apple | Iphone Os | >= 26.0, < 26.4 |
| Apple | Macos | < 26.4 |
References
- https://support.apple.com/en-us/126792Release Notes, Vendor Advisory
- https://support.apple.com/en-us/126793Release Notes, Vendor Advisory
- https://support.apple.com/en-us/126794Release Notes, Vendor Advisory
- https://support.apple.com/en-us/126800Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-28871?
A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site scripting attack.
How severe is CVE-2026-28871?
CVE-2026-28871 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.
How do I fix CVE-2026-28871?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-28871?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST