CVE-2026-40043
Pachno 1.0.6 Authentication Bypass via runSwitchUser()
- State
- Published
- Severity
- 7.1 High
- Published
- Apr 13, 2026
- Updated
- Apr 13, 2026
- Reserved
- Apr 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
Pachnopancho |
|
References
- Zero Science Lab Disclosurethird-party-advisory
- VulnCheck Advisory: Pachno 1.0.6 Authentication Bypass via runSwitchUser()third-party-advisory
- https://www.zeroscience.mk/#/advisories/ZSL-2026-5985exploit
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