PT-2026-35745 · Netmaker · Netmaker

Ravindu Wickramasinghe + 1 · Published 2026-04-28 · Updated 2026-04-29 · CVE-2026-38651

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Netmaker versions prior to 1.5.0

Description An authentication bypass exists because the VerifyHostToken() function in logic/jwts.go does not validate the JWT (JSON Web Token) signature when verifying host tokens. This allows an attacker to forge a JWT signed with an arbitrary key to impersonate any host in the network and access sensitive information.

Recommendations Update to version 1.5.0 or later. As a temporary workaround, restrict access to the VerifyHostToken() function until the update is applied.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-38651

GHSA-QPV2-RWC8-C993

Affected Products

Netmaker

References · 8

• 🔥 https://zyenra.com/blog/netmaker-jwt-verification-bypass · Exploit
• 🔥 https://zyenra.com/advisories/netmaker-jwt-verification-bypass · Exploit
• https://github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79b · Patch
• https://osv.dev/vulnerability/GHSA-qpv2-rwc8-c993 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-38651 · Security Note
• https://github.com/gravitl/netmaker · Note
• https://twitter.com/CVEnew/status/2049350460214272412 · Twitter Post
• https://twitter.com/infoflowcloud/status/2049350909528830397 · Twitter Post