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CVE-2025-68659

nvd nist
Published: Jan 28, 2026Modified: Jun 17, 2026

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5.3
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploitability: 3.9 / Impact: 1.4
Source: NVD

Description

Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have an application level denial of service vulnerabilityin the username change functionality at try.discourse.org. The vulnerability allows attackers to cause noticeable server delays and resource exhaustion by sending large JSON payloads to the username preference endpoint PUT /u//preferences/username, resulting in degraded performance for other users and endpoints. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds are available.

Affected (4)

Products: Discourse: Discourse
Discourse
1 product
Discourse
Configuration A
4 vulnerable
Vulnerable SoftwareAffected Versions
Discourse
Discourse
Before 3.5.4
Discourse
From 2025.11.0 to 2025.11.2
Discourse
Version 2025.12.0
Discourse
Version 2026.1.0

Related CWEs

CWE-770
Allocation of Resources Without Limits or Throttling
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References (1)

Source: security-advisories@github.com
Third Party Advisory

Timeline

No history available yet.