CVE-2026-34020 Apache OpenMeetings: Login Credentials Passed via GET Query Parameters

What is CVE-2026-34020?

CVE-2026-34020 is a high-severity vulnerability in Apache OpenMeetings, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Use of GET Request Method With Sensitive Query Strings vulnerability in Apache OpenMeetings.

The REST login endpoint uses HTTP GET method with username and password passed as query parameters. Please check references regarding possible impact

This issue affects Apache OpenMeetings: from 3.1.3 before 9.0.0.

Users are recommended to upgrade to version 9.0.0, which fixes the issue.

Weakness: CWE-598

Which versions are affected by CVE-2026-34020?

2 open source packages ship an affected version, including org.apache.openmeetings:openmeetings-parent. It affects 1 product.

Products include Apache Openmeetings.

How do I fix CVE-2026-34020?

Upgrade org.apache.openmeetings:openmeetings-parent to 9.0.0 or later.

Is CVE-2026-34020 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34020 exists.

Other vulnerabilities in Apache OpenMeetings

• CVE-2017-7664 Apache OpenMeetings does not correctly validate uploaded XML documents Critical 10.0
• CVE-2024-54676 Apache OpenMeetings: Deserialisation of untrusted data in cluster mode Critical 9.8
• CVE-2023-28326 Apache OpenMeetings: allows user impersonation Critical 9.8
• CVE-2016-8736 Apache OpenMeetings RCE Critical 9.8
• CVE-2017-7673 Apache OpenMeetings has Inadequate Encryption Strength Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gcvm-c75m-h4p4.