CVE-2026-40043

MEDIUM

Pachno 1.0.6 Authentication Bypass via runSwitchUser()

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: Pachno 1.0.6 Authentication Bypass via runSwitchUser()
https://www.vulncheck.com/advisories/pachno-authentication-bypass-via-runswitchuser
Third Party Advisory third-party-advisory
Zero Science Lab Disclosure
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5985.php

Scores

CVSS v3 6.5
EPSS 0.0030
EPSS Percentile 21.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-639
Status published
Products (1)
pancho/Pachno 1.0.6
Published Apr 13, 2026
Tracked Since Apr 14, 2026