GHSA-r727-5pf6-47r2: github.com/elastic/package-registry (CVE-2026-33467)

Elastic Package Registry has Improper Verification of Cryptographic Signature

CVSS 5.9 MediumEPSS 0.0014 · 3rd percentile

Published by the GitHub Advisory Database at 29 Apr 2026, 00:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/elastic/package-registry	Go	<1.38.0	1.38.0

Identifiers

GHSA-r727-5pf6-47r2 · CVE-2026-33467 · GO-2026-5611

Weakness (CWE)

CWE-347

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Go package github.com/elastic/package-registry is affected in versions before 1.38.0, and version 1.38.0 fixes the issue. An attacker who can intercept network traffic to a self-hosted registry, or otherwise influence the content it serves, could substitute a tampered package because the signature check does not fail closed. Upgrade to 1.38.0 or later.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N	CNA (elastic)

CISA KEV Not listed.
EPSS 0.0014, the 3rd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:06 UTC First seen by agentprime
31 Oct 2026, 15:06 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.