Yamcs up to 5.12.6 AuthHandler.java excessive authentication

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k3.49

Summaryinfo

A vulnerability was found in Yamcs up to 5.12.6. It has been declared as problematic. Impacted is an unknown function of the file yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java. The manipulation results in excessive authentication. This vulnerability is known as CVE-2026-44596. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Yamcs up to 5.12.6. Affected is some unknown processing of the file yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java. The manipulation with an unknown input leads to a excessive authentication vulnerability. CWE is classifying the issue as CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-44596 since 05/06/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1110.001.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 5.12.7 or 5.13.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (52605). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.7
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Excessive authentication
CWE: CWE-307 / CWE-799 / CWE-400
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Yamcs 5.12.7/5.13.0

Timelineinfo

05/06/2026 CVE reserved
07/16/2026 +71 days Advisory disclosed
07/16/2026 +0 days VulDB entry created
07/16/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-44596 (🔒)
GCVE (CVE): GCVE-0-2026-44596
GCVE (VulDB): GCVE-100-379560
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/16/2026 18:48
Updated: 07/16/2026 21:43
Changes: 07/16/2026 18:48 (52), 07/16/2026 21:43 (11)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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