mmctl export download command doesn’t restrict permissions to created file to file owner

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-3113
StatePUBLISHED
AssignerMattermost
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-26 17:16:42 UTC
Updated2026-03-30 19:41:30 UTC
DescriptionMattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to set permissions on downloaded bulk export which allows other local users on the server to be able to read contents of the bulk export.. Mattermost Advisory ID: MMSA-2026-00593

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-732 | CWE-732 CWE-732: Incorrect Permission Assignment for Critical Resource

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1[email protected]Secondary5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
3.1CNACVSS5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mattermost Mattermost Server All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mattermost Mattermost affected 11.4.0 11.4.0 semver Not specified
CNA Mattermost Mattermost affected 11.3.0 11.3.1 semver Not specified
CNA Mattermost Mattermost affected 11.2.0 11.2.3 semver Not specified
CNA Mattermost Mattermost affected 10.11.0 10.11.11 semver Not specified
CNA Mattermost Mattermost unaffected 11.5.0 Not specified
CNA Mattermost Mattermost unaffected 11.4.1 Not specified
CNA Mattermost Mattermost unaffected 11.3.2 Not specified
CNA Mattermost Mattermost unaffected 11.2.4 Not specified
CNA Mattermost Mattermost unaffected 10.11.12 Not specified

References

ReferenceSourceLinkTags
mattermost.com/security-updates [email protected] mattermost.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: winfunc (en)

Additional Advisory Data

Solutions

CNA: Update Mattermost to versions 11.5.0, 11.4.1, 11.3.2, 11.2.4, 10.11.12 or higher.

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