Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause O(n^2) processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as the shared worker pool becomes exhausted. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Lowering the max_draft_length site setting reduces attack surface but does not fully mitigate the issue, as payloads under the limit can still trigger the slow code path.
References
| Link | Resource |
|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-vwjh-vrx9-9849 | Third Party Advisory Mitigation |
Configurations
Configuration 1 (hide)
|
History
30 Jan 2026, 20:47
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/discourse/discourse/security/advisories/GHSA-vwjh-vrx9-9849 - Third Party Advisory, Mitigation | |
| CPE | cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* |
|
| First Time |
Discourse
Discourse discourse |
28 Jan 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-28 20:16
Updated : 2026-01-30 20:47
NVD link : CVE-2025-68934
Mitre link : CVE-2025-68934
CVE.ORG link : CVE-2025-68934
JSON object : View
Products Affected
discourse
- discourse
CWE
CWE-770
Allocation of Resources Without Limits or Throttling