CVE-2026-28219

The record

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, an improper authorization check in the topic management logic allows authenticated users to modify privileged attributes of their topics. By manipulating specific parameters in a PUT or POST request, a regular user can elevate a topic’s status to a site-wide notice or banner, bypassing intended administrative restrictions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. There are no practical workarounds to prevent this behavior other than applying the security patch. Administrators concerned about unauthorized promotions should audit recent changes to site banners and global notices until the fix is deployed.

Affected packages

Related vulnerabilities

• CVE-2026-96378 Improperly Controlled Modification of Dynamically-Determined Object Attributes… CWE-915
• CVE-2026-84645 In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, objects of types marked as storing… CWE-915
• CVE-2026-84430 A security vulnerability has been detected in gouguoa up to 5.10.0/6.0.1. CWE-915
• CVE-2026-83557 DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically… CWE-915
• CVE-2026-78038 Improperly Controlled Modification of Dynamically-Determined Object Attributes… CWE-915
• CVE-2026-59284 There is no allow list for property keys when Spring Cloud Commons writable /actuator/env… CWE-915
• CVE-2026-47849 Spring Data REST does not guard identifier (@Id) and version (@Version) properties… CWE-915
• CVE-2026-47850 Spring Data REST does not preserve the persisted version (@Version) property of an… CWE-915