CVE-2026-46413

MEDIUM 6.5

Discourse: Regular users can route multipart uploads into the admin backup store

CVSS Score

6.5

EPSS Score

0.4%

EPSS Percentile

29th

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.

CWE	CWE-862
Vendor	discourse
Product	discourse
Published	Jul 9, 2026
Last Updated	Jul 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

discourse / discourse

>= 2026.1.0-latest, < 2026.1.5 >= 2026.4.0-latest, < 2026.4.2 >= 2026.5.0-latest, < 2026.5.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗