PatchTheCVECVE-2026-28890: An out-of-bounds read was addressed with improved bounds checking
CVE-2026-28890 is a medium-severity flaw (CVSS 5.5) affecting xcode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 26.4. An app may be able to cause unexpected system termination.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.1% (top 99%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-03-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-28890?
xcode: upgrade to 26.4. Exact commands for each OS are on this page.
Is CVE-2026-28890 being exploited?
CVE-2026-28890 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-28890 affect?
CVE-2026-28890 affects xcode. Severity is medium (CVSS 5.5). An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 26.4. An app may be able to cause unexpected system termination.
How urgent is CVE-2026-28890?
Priority 20/100. No elevated risk signals yet.
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