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TI-2019-11707 Aliases CVE-2019-15608GHSA-hjxc-462x-x77j

Time-of-check time-of-use race condition in yarn

Priority LOW 30CWE-840Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

The package integrity validation in yarn < 1.19.0 contains a TOCTOU vulnerability where the hash is computed before writing a package to cache. It's not computed again when reading from the cache. This may lead to a cache pollution attack.

Why it matters now

EPSS 0.01836 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed yarn (npm): 1.19.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—yarnFixed in 1.19.0—No fix listedCNA
—yarn (npm)before 1.19.01.19.0Patch availableGHSA-hjxc-462x-x77j
  • yarn Vendor— Affected Fixed in 1.19.0 Fixed in — No fix listed CNA
  • yarn (npm) Vendor— Affected before 1.19.0 Fixed in 1.19.0 Patch available GHSA-hjxc-462x-x77j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:*before 1.19.0Vulnerableyarnpkg
  • cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:* Versions before 1.19.0 Vulnerable ·yarnpkg

Remediation

  • Fix · GHSA-hjxc-462x-x77j yarn (npm) Fixed in 1.19.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Quay 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-15608
  2. 2026-10-03 Alias added: GHSA-hjxc-462x-x77j

References

Exploit 1

Advisory 1

Other 2

  • TI-2025-07562 yarnpkg Yarn hosted-git-resolver.js explodeHostedGitFragment redos CVSS 4.0MEDIUM 5.3
  • TI-2025-08532 yarnpkg Yarn request-manager.js setOptions redos CVSS 4.0MEDIUM 4.8
  • TI-2020-06549 Path traversal in yarn CVSS 3.1HIGH 7.5
  • TI-2019-08038 Link following in Yarn CVSS 3.1HIGH 7.8
  • TI-2021-03291 Yarn: untrusted search path CVSS 3.1HIGH 7.8
  • TI-2019-03856 Cleartext transmission of sensitive information in yarn CVSS 3.1HIGH 8.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences