VDB-359992 · CVE-2026-38651 · EUVD-2026-26062

Netmaker up to 1.4.x logic/jwts.go VerifyHostToken information disclosure

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Netmaker up to 1.4.x. The affected element is the function VerifyHostToken of the file logic/jwts.go. Executing a manipulation can lead to information disclosure. This vulnerability is tracked as CVE-2026-38651. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Netmaker up to 1.4.x. This vulnerability affects the function VerifyHostToken of the file logic/jwts.go. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Authentication Bypass vulnerability exists in Netmaker versions prior to 1.5.0. The VerifyHostToken function in logic/jwts.go fails to validate the JWT signature when verifying host tokens. An attacker can forge a JWT signed with any arbitrary key and use it to impersonate any host in the network, gaining access to sensitive information

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-38651 since 04/06/2026. The exploitation appears to be easy. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 1.5.0 eliminates this vulnerability. Applying the patch 5309aa70d464ef565911369714d661a61481a79b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26062). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Netmaker

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.8

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 8.2
ADP CISA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Netmaker 1.5.0
Patch: 5309aa70d464ef565911369714d661a61481a79b

Timelineinfo

04/06/2026 CVE reserved
04/28/2026 +22 days Advisory disclosed
04/28/2026 +0 days VulDB entry created
05/18/2026 +20 days VulDB entry last update

Sourcesinfo

Advisory: 5309aa70d464ef565911369714d661a61481a79b
Status: Confirmed

CVE: CVE-2026-38651 (🔒)
GCVE (CVE): GCVE-0-2026-38651
GCVE (VulDB): GCVE-100-359992
EUVD: 🔒

Entryinfo

Created: 04/28/2026 18:44
Updated: 05/18/2026 20:16
Changes: 04/28/2026 18:44 (58), 04/28/2026 20:16 (1), 05/18/2026 20:16 (11)
Complete: 🔍
Cache ID: 216::103

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