CVE-2026-33467: Elastic Package Registry has Improper Verification of Cryptographic Signature

April 29, 2026 (updated May 6, 2026)

Improper Verification of Cryptographic Signature (CWE-347) in Elastic Package Registry could allow an attacker positioned to intercept network traffic, or to otherwise influence the contents served to a self-hosted registry, to substitute a tampered package without the integrity check failing closed.

References

discuss.elastic.co/t/elastic-package-registry-1-38-0-security-update-esa-2026-27/386081
github.com/advisories/GHSA-r727-5pf6-47r2
github.com/elastic/package-registry
nvd.nist.gov/vuln/detail/CVE-2026-33467

Code Behaviors & Features

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