Unrated severityNVD Advisory· Published Jul 9, 2026· Updated Jul 10, 2026
Discourse: Regular users can route multipart uploads into the admin backup store
CVE-2026-46413
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.
Affected products
2- Range: <2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5
Patches
Vulnerability mechanics
References
9- github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0mitrex_refsource_MISC
- github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40mitrex_refsource_MISC
- github.com/discourse/discourse/commit/a53df26dcf7e50ce2b20bfd5454a0c9d44b8fc7dmitrex_refsource_MISC
- github.com/discourse/discourse/commit/abaa664c5df84026efb2ca264ba0f5586c3f2b01mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.1.5mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.4.2mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.5.1mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.6.0mitrex_refsource_MISC
- github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7mitrex_refsource_CONFIRM
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