Is CVE-2026-104439 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104439?

CVE-2026-104439 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-104439

Description

YesWiki before 4.6.7 contains a user enumeration vulnerability in LostPasswordAction.php that allows unauthenticated attackers to confirm registered email addresses through differing responses. Attackers can submit emails to the MotDePassePerdu recovery page without rate limiting to identify valid accounts for targeted phishing or password-spraying.