How severe is CVE-2019-5448?

CVE-2019-5448 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-2019-5448 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5448?

CVE-2019-5448 affects Yarnpkg Yarn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-5448?

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-2019-5448 published?

CVE-2019-5448 was published on 2019-07-30 and last updated on 2026-06-17.

CVE-2019-5448

CVE-2019-5448 is a high-severity vulnerability in Yarnpkg Yarn 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: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Yarnpkg Yarn
Published: 2019-07-30
Last modified: 2026-06-17

Description

Yarn before 1.17.3 is vulnerable to Missing Encryption of Sensitive Data due to HTTP URLs in lockfile causing unencrypted authentication data to be sent over the network.

Frequently asked questions

What is CVE-2019-5448?: Yarn before 1.17.3 is vulnerable to Missing Encryption of Sensitive Data due to HTTP URLs in lockfile causing unencrypted authentication data to be sent over the network.
How severe is CVE-2019-5448?: CVE-2019-5448 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-2019-5448 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5448?: CVE-2019-5448 affects Yarnpkg Yarn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-5448?: 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-2019-5448 published?: CVE-2019-5448 was published on 2019-07-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:*

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