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CVE-2026-46413Discourse: Regular users can route multipart uploads into the admin backup store
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, regular users could route direct S3 multipart uploads through ExternalUploadManager into the admin backup store. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
6.5 MEDIUMEPSS 0.51%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.5 | MEDIUM | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Details
- CVE ID
- CVE-2026-46413
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 9, 2026
- Last modified
- 2026-07-14 20:41 UTC
- Weaknesses
- CWE-862 · Missing Authorization
Affected Products
As published by the CNA in the CVE record.
discoursediscourse3 version ranges
- >= 2026.1.0-latest, < 2026.1.5
- >= 2026.4.0-latest, < 2026.4.2
- >= 2026.5.0-latest, < 2026.5.1
References
- github.com https://github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0
- github.com https://github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40
- github.com https://github.com/discourse/discourse/commit/a53df26dcf7e50ce2b20bfd5454a0c9d44b8fc7d
- github.com https://github.com/discourse/discourse/commit/abaa664c5df84026efb2ca264ba0f5586c3f2b01
- github.com https://github.com/discourse/discourse/releases/tag/v2026.1.5
- github.com https://github.com/discourse/discourse/releases/tag/v2026.4.2
- github.com https://github.com/discourse/discourse/releases/tag/v2026.5.1
- github.com https://github.com/discourse/discourse/releases/tag/v2026.6.0
- github.com https://github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7