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Security Advisories

CGA-4rp2-57j3-9cff

Package

cortex

Component

github.com/prometheus/prometheus

Latest update

Pending upstream fix

Aliases

  • CVE-2026-42154
  • GHSA-8rm2-7qqf-34qm
  • GO-2026-5264

Severity

7.5

High

CVSS V3

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References

  • https://nvd.nist.gov/vuln/detail/CVE-2026-42154
  • https://github.com/advisories/GHSA-8rm2-7qqf-34qm
  • https://pkg.go.dev/vuln/GO-2026-5264

Updates

Status

Pending upstream fix

Impact

Fixed in github.com/prometheus/prometheus@v0.311.3, but cortex v1.21.0 (latest) and master still import github.com/prometheus/prometheus/tsdb/errors in multiple files. That package was removed upstream in prometheus PR #17768 (multi-errors migrated to the standard errors package). Bumping prometheus requires upstream cortex to first migrate ~6 source files from tsdb_errors.NewMulti() to errors.Join(). Waiting on upstream cortex to land that migration.

Status

Under investigation

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