Vulnerability · Published Apr 13, 2026 · Assigned by VulnCheck
CVE-2026-40039Pachno 1.0.6 Open Redirection via return_to Parameter
Medium 6.5
In plain English
A medium-severity security flaw in Pachno from Pachno. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 72.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary external websites by manipulating the return_to parameter. Attackers can craft malicious login URLs with unvalidated return_to values to conduct phishing attacks and steal user credentials.
Affected products (as reported)
Weakness: CWE-305 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- Zero Science Lab Disclosure third-party-advisory
- VulnCheck Advisory: Pachno 1.0.6 Open Redirection via return_to Parameter third-party-advisory