CVE-2026-40039: high-severity vulnerability in Pachno
Pachno 1.0.6 Open Redirection via return_to Parameter
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.3%
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
Affected products
Pachno · PachnoRelated CVEs — Pachno
In the same product, most dangerous first.
CVE-2026-40044CRITICALPachno 1.0.6 FileCache Deserialization Remote Code ExecutionEPSS 0.5%CVE-2026-40040HIGHPachno 1.0.6 Unrestricted File Upload Remote Code ExecutionEPSS 0.5%CVE-2026-40042CRITICALPachno 1.0.6 Wiki TextParser XML External Entity InjectionEPSS 0.4%CVE-2026-40038MEDIUMPachno 1.0.6 Stored Cross-Site Scripting via Multiple ParametersEPSS 0.2%CVE-2026-40041MEDIUMPachno 1.0.6 Cross-Site Request Forgery via State-Changing EndpointsEPSS 0.1%