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CVE-2026-46413

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

Published: Jul 9, 2026Updated: Jul 14, 2026 Sources: CVE List NVDCWE-862
6.5MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 70.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

discourse
commercial·USaka discourse.org
discourse
Web & CMS Plugins

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7
github.com
https://github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0
github.com
https://github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40
github.com
and 6 more references View all →

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