How severe is CVE-2020-1887?

CVE-2020-1887 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-1887 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-1887?

CVE-2020-1887 affects Linuxfoundation Osquery. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-1887?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-1887 published?

CVE-2020-1887 was published on 2020-03-13 and last updated on 2026-06-17.

CVE-2020-1887

CVE-2020-1887 is a critical-severity vulnerability in Linuxfoundation Osquery with a CVSS 3.x base score of 9.1. 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-295.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Linuxfoundation Osquery
Published: 2020-03-13
Last modified: 2026-06-17

Description

Incorrect validation of the TLS SNI hostname in osquery versions after 2.9.0 and before 4.2.0 could allow an attacker to MITM osquery traffic in the absence of a configured root chain of trust.

Frequently asked questions

What is CVE-2020-1887?: Incorrect validation of the TLS SNI hostname in osquery versions after 2.9.0 and before 4.2.0 could allow an attacker to MITM osquery traffic in the absence of a configured root chain of trust.
How severe is CVE-2020-1887?: CVE-2020-1887 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-1887 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-1887?: CVE-2020-1887 affects Linuxfoundation Osquery. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-1887?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-1887 published?: CVE-2020-1887 was published on 2020-03-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:osquery:*:*:*:*:*:*:*:*

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