BIT-discourse-2026-46413: Discourse: Regular users can route multipart uploads into the admin backup store
Discourse versions prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a vulnerability where regular users could route direct S3 multipart uploads through the ExternalUploadManager into the admin backup store. This issue has been fixed in the specified versions. The vulnerability is classified as medium severity.
AI Analysis
Technical Summary
Discourse, an open-source discussion platform, had a vulnerability (CVE-2026-46413) affecting versions before 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5. The flaw allowed regular users to route multipart uploads intended for S3 storage through the ExternalUploadManager into the administrative backup storage area. This could potentially lead to unauthorized manipulation or storage of data in the admin backup store. The issue is resolved in the fixed versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Potential Impact
Regular users could improperly route multipart uploads into the admin backup store, potentially compromising the integrity or confidentiality of backup data. The exact impact details are not specified beyond this unauthorized routing capability.
Mitigation Recommendations
Upgrade Discourse to one of the fixed versions: 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5. These versions contain the official fix for this vulnerability. No other mitigation steps are indicated.
BIT-discourse-2026-46413: Discourse: Regular users can route multipart uploads into the admin backup store
Description
Discourse versions prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a vulnerability where regular users could route direct S3 multipart uploads through the ExternalUploadManager into the admin backup store. This issue has been fixed in the specified versions. The vulnerability is classified as medium severity.
Affected software
pkg:bitnami/discourseRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Discourse, an open-source discussion platform, had a vulnerability (CVE-2026-46413) affecting versions before 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5. The flaw allowed regular users to route multipart uploads intended for S3 storage through the ExternalUploadManager into the administrative backup storage area. This could potentially lead to unauthorized manipulation or storage of data in the admin backup store. The issue is resolved in the fixed versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Potential Impact
Regular users could improperly route multipart uploads into the admin backup store, potentially compromising the integrity or confidentiality of backup data. The exact impact details are not specified beyond this unauthorized routing capability.
Mitigation Recommendations
Upgrade Discourse to one of the fixed versions: 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5. These versions contain the official fix for this vulnerability. No other mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-discourse-2026-46413
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-46413"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- Cvss Version
- null
Threat ID: 6a58b51a68715ace43db45a9
Added to database: 07/16/2026, 10:40:26 UTC
Last enriched: 07/16/2026, 14:30:04 UTC
Last updated: 07/16/2026, 22:08:02 UTC
Views: 10
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