CVE-2019-8840
CVE-2019-8840 is a high-severity vulnerability in Apple Xcode with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.5
- EPSS exploit prediction: 1% (66th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Apple Xcode
- Published:
- Last modified:
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 11.3. Compiling with untrusted sources may lead to arbitrary code execution with user privileges.
Frequently asked questions
- What is CVE-2019-8840?
- An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 11.3. Compiling with untrusted sources may lead to arbitrary code execution with user privileges.
- How severe is CVE-2019-8840?
- CVE-2019-8840 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-8840 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-8840?
- CVE-2019-8840 affects Apple Xcode. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-8840?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2019-8840 published?
- CVE-2019-8840 was published on 2020-10-27 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*
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