5.4
MediumCVSS 3.1 · from esaqa
CVE-2026-117471
User-controlled Duo host permits authenticated SSRF in Psono Server
Psono · Server-side request forgery · CWE-918AffectedPsono
FixUpdate to 7.2.4 or newer
PublishedOct 27, 05:55 · esaqa
ScoredOct 27 · 5.4 · esaqa
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:10 UTC
What we know
No known exploitation. CISA KEV, checked 22:10 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker needs network access and an account. CVSS: network, low privileges.
Description
Psono Server CE && EE versions 0.1.0 through 7.2.3 accepted a user-controlled host when configuring a personal Duo device and passed it to the Duo client without an allowlist or explicit timeout. An authenticated remote attacker could cause the server to connect to selected hosts over HTTPS on port 443 and distinguish failure modes, providing an internal DNS and service-reachability oracle. Connections still required TLS certificate validation, and the flaw did not provide arbitrary protocol or port access. Unresponsive targets could also occupy a server worker until the operating-system timeout.
From esaqa
Affected and fixed versions
ProductAffectedFixed inPsono0.1.0 – before 7.2.47.2.4
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known