How severe is CVE-2019-10101?

CVE-2019-10101 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-10101 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10101?

CVE-2019-10101 affects Jetbrains Kotlin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10101?

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-2019-10101 published?

CVE-2019-10101 was published on 2019-07-03 and last updated on 2026-06-17.

CVE-2019-10101

CVE-2019-10101 is a high-severity vulnerability in Jetbrains Kotlin with a CVSS 3.x base score of 8.1. 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-319.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Jetbrains Kotlin
Published: 2019-07-03
Last modified: 2026-06-17

Description

JetBrains Kotlin versions before 1.3.30 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack.

Frequently asked questions

What is CVE-2019-10101?: JetBrains Kotlin versions before 1.3.30 were resolving artifacts using an http connection during the build process, potentially allowing an MITM attack.
How severe is CVE-2019-10101?: CVE-2019-10101 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-10101 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10101?: CVE-2019-10101 affects Jetbrains Kotlin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10101?: 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-2019-10101 published?: CVE-2019-10101 was published on 2019-07-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jetbrains:kotlin:*:*:*:*:*:*:*:*

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