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Advisory record · GHSA-w5r6-mcgq-7pq4

Yamcs has No Rate Limiting on Authentication Endpoint

CVSS 6.5 MediumEPSS 0.021 · 81st percentile

Published by the GitHub Advisory Database at 27 May 2026, 00:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.yamcs:yamcs-coreMaven<5.12.75.12.7
Identifiers
GHSA-w5r6-mcgq-7pq4 · CVE-2026-44596
Weakness (CWE)
CWE-307
Tags
Published
27 May 2026
Updated
27 May 2026

Machine-written summary

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

Yamcs (org.yamcs:yamcs-core) versions before 5.12.7 have no rate limiting, account lockout, or failed-attempt throttling on the POST /auth/token authentication endpoint. An unauthenticated remote attacker can therefore make unlimited password guessing attempts against any user account. Upgrade to version 5.12.7, which is listed as the fixed version.

Written 3 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
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.021, the 81st percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 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.