CVE-2026-44596

Description

Yamcs has No Rate Limiting on Authentication Endpoint

Overview

State

—

Assigner (CNA)

—

CVSS severity

medium

CVSS score

6.5 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Effective score

6.5 / 10 MEDIUM source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-44596

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-07-16 17:16:55 UTC

NVD last modified

2026-07-17 18:44:26 UTC

NVD CVSS v3.1

6.5 / 10 MEDIUM source: security-advisories@github.com

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitability subscore

3.9 / 10

Impact subscore

2.5 / 10

EPSS score

0.0173 (probability of exploitation in next 30 days)

EPSS percentile

75.31% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD-assigned CWE(s): CWE-307 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-44956

Assigner

GitHub_M

Published

Jul 16, 2026, 4:04:11 PM

Updated

Jul 17, 2026, 2:05:15 PM

EUVD base score (CVSS 3.1)

6.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EUVD-reported EPSS

1.7300

Vendors

yamcs

Products

yamcs (< 5.12.7)

Aliases

GHSA-w5r6-mcgq-7pq4

ENISA description: Yamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java, lacked any rate limiting, account lockout, or failed-attempt throttling, so an unauthenticated remote attacker could perform unlimited password-guessing attempts against any user account, significantly increasing the risk of successful brute-force attacks. This issue is fixed in versions 5.12.7 and 5.13.0.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-44596 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-44596 tenable:www.cve.org

• CVE-2026-44596 — Org.Yamcs:Yamcs-Core | dbugs
  web:dbugs.ptsecurity.com

  Details on CVE-2026-44596 : Yamcs. Exploited in the wild. Includes CVSS score, affected versions, and references.

  2026-06-19 02:54 UTC
• CVE-2026-44596 - Exploits & Severity - Feedly
  web:feedly.com

  CVE-2026-44596 Improper Restriction of Excessive Authentication Attempts (CWE-307)

  2026-06-19 02:54 UTC
• ex-cal1bur/CVE-2026-44596: YAMCS yamcs-core - GitHub
  web:github.com

  YAMCS yamcs-core < 5.12.7 lacks rate limiting on POST /auth/token. An unauthenticated attacker can perform unlimited brute-force attempts against any account. Never returns HTTP 429. Fixed in 5.12.7. - ex-cal1bur/ CVE - 2026 - 44596

  2026-06-19 02:54 UTC
• CVE-2026-44596/README.md at main - GitHub
  web:github.com

  YAMCS yamcs-core < 5.12.7 lacks rate limiting on POST /auth/token. An unauthenticated attacker can perform unlimited brute-force attempts against any account. Never returns HTTP 429. Fixed in 5.12.7. - CVE - 2026 - 44596 /README.md at main · ex-cal1bur/ CVE - 2026 - 44596

  2026-06-19 02:54 UTC
• CVE-2026-44596 | Security Details | Sonatype Guide
  web:guide.sonatype.com

  Find vulnerabilities. Fix fast with AI. Search components by package, version, or CVE to get started. Unlock full vulnerability insights and fix guidance with Sonatype Guide.

  2026-06-19 02:54 UTC
• Security Update Guide - Microsoft Security Response Center
  web:msrc.microsoft.com

  Security Update Guide - Microsoft Security Response Center

  2026-06-19 02:54 UTC
• Addressing Exchange Server May 2026 vulnerability CVE-2026-42897
  web:techcommunity.microsoft.com

  UPDATE June 9, 2026 : Please see our release blog post for June 2026 Security Update for more information on this CVE : Released: June 2026 Exchange Server Security Updates | Microsoft Community Hub. On May 14, 2026 , Microsoft disclosed CVE - 2026 -42897, a reported vulnerability affecting Exchange Outlook Web Access (OWA). An attacker could exploit this issue by sending a specially crafted email ...

  2026-06-19 02:54 UTC
• CVE-2026-44596: Yamcs Core Authentication Endpoint Lacks Rate Limiting
  web:vulert.com

  CVE-2026-44596 details a vulnerability in the Yamcs Core package, allowing unlimited authentication attempts. Learn how to fix it and protect your application.

  2026-06-19 02:54 UTC
• Oracle Critical Patch Update Advisory - January 2026
  web:www.oracle.com

  Oracle Critical Patch Update Advisory - January 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...

  2026-06-19 02:54 UTC
• CVE-2026-44596 | Tenable®
  web:www.tenable.com

  Yamcs has No Rate Limiting on Authentication Endpoint

  2026-06-19 02:54 UTC

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