CVE-2026-46413 | BDVDB-2026-346552 Detail
discoursediscourse
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact none. Attack vector: network.
Weaknesses#
- CWE-862 Missing Authorization
References#
- https://github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7
- https://github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0
- https://github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40
- https://github.com/discourse/discourse/commit/a53df26dcf7e50ce2b20bfd5454a0c9d44b8fc7d
- https://github.com/discourse/discourse/commit/abaa664c5df84026efb2ca264ba0f5586c3f2b01
- https://github.com/discourse/discourse/releases/tag/v2026.1.5
- https://github.com/discourse/discourse/releases/tag/v2026.4.2
- https://github.com/discourse/discourse/releases/tag/v2026.5.1
- https://github.com/discourse/discourse/releases/tag/v2026.6.0
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.