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Vulnerability record · CVE-2026-40039 · published 13 April 2026

CVE-2026-40039: Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary e…

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.

7.1 CVSS 4.0 High EPSS 0.40% · top 68.3% CWE-305 · CWE-305 Deferred
7.1CVSS 4.0 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.vulncheck.com/advisories/pachno-open-redirection-via-return-to-parameter
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5981.php

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Source: NIST National Vulnerability Database (record CVE-2026-40039), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.