CVE-2026-46347: Goobi viewer: Predictable Replacement Password Allows Account Takeover After Password Reset

Vulnerability summary

CVE-2026-46347 is a medium (CVSS 6.8) Use of Insufficiently Random Values vulnerability in intranda goobi-viewer-core.

Timeline

1. 23-10-2026
   PublishedVulnerability first disclosed.

Description

The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. Prior to version 26.05, when a password reset link is visited, the application generates a replacement password in a predictable way and emails it to the account holder. The insufficient entropy allows the password to be brute-forced by an attacker who can approximate the server-side generation time. Exploiting this finding in isolation requires the victim to have triggered the reset themselves and the attacker to infer the server time from network or email metadata. This issue has been patched in version 26.05.

• CWE-330Use of Insufficiently Random ValuesThe product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
• CWE-340Generation of Predictable Numbers or IdentifiersThe product uses a scheme that generates numbers or identifiers that are more predictable than required.
• CWE-640Weak Password Recovery Mechanism for Forgotten PasswordThe product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak.