Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-p378-jp5r-gpgw

arc has unauthenticated cluster node admission when `cluster.shared_secret` is unset

CVSS 6.9 MediumEPSS 0.0066 · 52nd percentile

Published by the GitHub Advisory Database at 28 Aug 2026, 20:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/basekick-labs/arcGo<0.0.0-20260615160325-38402ad2ebdd0.0.0-20260615160325-38402ad2ebdd
Identifiers
GHSA-p378-jp5r-gpgw · CVE-2026-55678 · GO-2026-6322
Weakness (CWE)
CWE-284 · CWE-287 · CWE-306
Tags
Published
28 Aug 2026
Updated
2 Sept 2026

Machine-written summary

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

Arc Enterprise clustering in github.com/basekick-labs/arc accepts cluster join requests without authentication when cluster.enabled is true but cluster.shared_secret is not set; the affected version is before 0.0.0-20260615160325-38402ad2ebdd. A network attacker who can reach the coordinator port can join as a trusted node, receive forwarded requests that carry authentication headers, and alter cluster membership. Upgrade to 0.0.0-20260615160325-38402ad2ebdd, and set cluster.shared_secret when clustering is enabled.

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

ScoreRatingCVSSVectorSource
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0066, the 52nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:47 UTC First seen by agentprime
  2. 31 Oct 2026, 14:47 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.