CVE-2026-3112Disclosure(mattermost / mattermost_server)

LOWCVSS 4.9 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Mattermost 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 validate Advanced Logging file target paths which allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration in support packet generation. Mattermost Advisory ID: MMSA-2025-00562

mattermost CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://mattermost.com/security-updates

Weakness type (CWE)

CWE-22

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

mattermost_server

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

mattermost

Products

mattermost_server

1 version affected across 1 product

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud195d
Disclosure
🚨*CVE* CVE-2026-3112 Mattermost 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 validate Advanced Logging file target paths which allows system ad… https://www.cve.org/CVERecord?id=CVE-2026-3112 ----- Traducción: CVE-2026-3112 Mat… http://infoflow.cloud`
Post summary
The post reports CVE-2026-3112, noting that certain Mattermost versions fail to validate Advanced Logging file target paths, potentially allowing unauthorized access; no PoC, exploit, patch, or evidence of active exploitation is provided.
0000026
65 followersView on X
CVE@CVEnew195d
Disclosure
CVE-2026-3112 Mattermost 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 validate Advanced Logging file target paths which allows system ad… https://www.cve.org/CVERecord?id=CVE-2026-3112
Post summary
The post discloses CVE-2026-3112, detailing that specific Mattermost versions fail to validate logging file target paths, which could lead to unauthorized file access; no PoC, exploit, or patch is mentioned.
00000185
56.9K followersView on X

CPE platform detail2 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

2 of 2 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	mattermost	mattermost_server	-	-	-
App	mattermost	mattermost_server	11.4.0	-	-

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