What’s Vulnerable › Vulnerabilities

CVE-2019-5448

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-07-30 · updated 2026-06-17
• Weakness: CWE-311

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.

Affected products

• yarn: before 1.17.3 — fixed in 1.17.3

How to fix

Upgrade to a fixed version: yarn 1.17.3. Check the vendor advisory for mitigations.

References

• https://github.com/ChALkeR/notes/blob/master/Yarn-vuln.md
• https://hackerone.com/reports/640904
• https://yarnpkg.com/blog/2019/07/12/recommended-security-update/
• https://github.com/ChALkeR/notes/blob/master/Yarn-vuln.md
• https://hackerone.com/reports/640904
• https://yarnpkg.com/blog/2019/07/12/recommended-security-update/

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