CVE-2026-40043

Pachno 1.0.6 contains an authentication bypass vulnerability in the runSwitchUser() action that allows authenticated low-privilege users to escalate privileges by manipulating the original_username cookie. Attackers can set the client-controlled original_username cookie to any value and request a switch to user ID 1 to obtain session tokens or password hashes belonging to administrator accounts.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.vulncheck.com/advisories/pachno-authentication-bypass-via-runswitchuser
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5985.php
https://www.zeroscience.mk/#/advisories/ZSL-2026-5985

Configurations

No configuration.

History

No history.

Information

Published : 2026-04-13 19:16

Updated : 2026-06-17 10:44

NVD link : CVE-2026-40043

Mitre link : CVE-2026-40043

CVE.ORG link : CVE-2026-40043

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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