Denial of Service Vulnerability in Discourse Platform
CVE-2025-68934

6.5MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
28 January 2026

What is CVE-2025-68934?

The vulnerability in the Discourse platform allows authenticated users to exploit the /drafts.json endpoint by submitting specially crafted payloads. This results in a significant slowdown due to O(n^2) processing during Base62 decoding, leading to worker exhaustion and service disruption for all users. The affected versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 are at risk. While lowering the max_draft_length can minimize exposure, it does not eliminate the potential for attack, as payloads beneath this threshold can still initiate the slow processing path.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

discourse < 3.5.4 < 3.5.4

discourse >= 2025.11.0-latest, < 2025.11.2 < 2025.11.0-latest, 2025.11.2

discourse >= 2025.12.0-latest, 2025.12.1 >= 2025.12.0-latest, 2025.12.1

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.