CVE-2021-4047
CVE-2021-4047 is a high-severity vulnerability in Redhat Openshift with a CVSS 3.x base score of 7.5. 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-20.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-20
- Affected product: Redhat Openshift
- Published:
- Last modified:
Description
The release of OpenShift 4.9.6 included four CVE fixes for the haproxy package, however the patch for CVE-2021-39242 was missing. This issue only affects Red Hat OpenShift 4.9.
Frequently asked questions
- What is CVE-2021-4047?
- The release of OpenShift 4.9.6 included four CVE fixes for the haproxy package, however the patch for CVE-2021-39242 was missing. This issue only affects Red Hat OpenShift 4.9.
- How severe is CVE-2021-4047?
- CVE-2021-4047 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2021-4047 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-4047?
- CVE-2021-4047 affects Redhat Openshift. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-4047?
- 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-2021-4047 published?
- CVE-2021-4047 was published on 2022-04-11 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:redhat:openshift:4.9:*:*:*:*:*:*:*
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