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CVE-2026-36537

CRITICAL Exploitation: PoC
9.8
CVSS 3.1
Description
ThingsBoard v4.3.0.1 is vulnerable to an authentication bypass during the OAuth authorization code exchange. The application improperly trusts user-supplied identity data within the user parameter of the /login/oauth2/code/ endpoint. By manipulating the email address in this JSON object, a remote attacker can bypass authentication and gain full access to any existing user account on the platform without possessing the target user's credentials. This results in a complete account takeover.

Metadata

CVE ID
CVE-2026-36537
State
PUBLISHED
Assigner
mitre
Reserved
2026-04-06 00:00 UTC
Published
2026-06-15 00:00 UTC
Last updated
2026-06-16 13:19 UTC
Primary CWE
CWE-290
CWE-290 Authentication Bypass by Spoofing
Vendor / Product
n/a / n/a
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
n/a n/a — n/a
Weakness (CWE)
CWESourceDescription
— cna n/a
CWE-290 adp CWE-290 Authentication Bypass by Spoofing
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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