CVE-2026-3113 | Mattermost up to 10.11.11/11.2.3/11.3.1/11.4.0 permission assignment

VDB-353698 · CVE-2026-3113 · GCVE-0-2026-3113 MATTERMOST UP TO 10.11.11/11.2.3/11.3.1/11.4.0 PERMISSION ASSIGNMENT HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.8 $0-$5k 2.71+ Summaryinfo A vulnerability, which was classified as problematic, was found in Mattermost up to 10.11.11/11.2.3/11.3.1/11.4.0. This issue affects some unknown processing. Executing a manipulation can lead to permission assignment. This vulnerability appears as CVE-2026-3113. The attack requires local access. There is no available exploit. You should upgrade the affected component. Detailsinfo A vulnerability was found in Mattermost up to 10.11.11/11.2.3/11.3.1/11.4.0. It has been declared as problematic. This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a permission assignment vulnerability. The CWE definition for the vulnerability is CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. As an impact it is known to affect confidentiality. CVE summarizes: 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 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 The weakness was presented by winfunc. The advisory is available at mattermost.com. This vulnerability was named CVE-2026-3113 since 02/24/2026. The exploitation appears to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. Upgrading to version 10.11.12, 11.2.4, 11.3.2, 11.4.1 or 11.5.0 eliminates this vulnerability. Productinfo Type Groupware Software Name Mattermost Version 10.11.0 10.11.1 10.11.2 10.11.3 10.11.4 10.11.5 10.11.6 10.11.7 10.11.8 10.11.9 10.11.10 10.11.11 11.0 11.1 11.2 11.2.0 11.2.1 11.2.2 11.2.3 11.3 11.3.0 11.3.1 11.4.0 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 3.9 VulDB Meta Temp Score: 3.8 VulDB Base Score: 2.8 VulDB Temp Score: 2.7 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.0 CNA Vector (Mattermost): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Permission assignment CWE: CWE-732 / CWE-275 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Mattermost 10.11.12/11.2.4/11.3.2/11.4.1/11.5.0 Timelineinfo 02/24/2026 CVE reserved 03/26/2026 +30 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Advisory: mattermost.com Researcher: winfunc Status: Confirmed CVE: CVE-2026-3113 (🔒) GCVE (CVE): GCVE-0-2026-3113 GCVE (VulDB): GCVE-100-353698 Entryinfo Created: 03/26/2026 19:06 Changes: 03/26/2026 19:06 (63) Complete: 🔍 Cache ID: 99:A77:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸