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
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3112.json",
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "11.4.0"
},
{
"last_affected": "11.4.0"
},
{
"introduced": "11.3.0"
},
{
"last_affected": "11.3.1"
},
{
"introduced": "11.2.0"
},
{
"last_affected": "11.2.3"
},
{
"introduced": "10.11.0"
},
{
"last_affected": "10.11.11"
}
]
}
],
"cwe_ids": [
"CWE-22"
]
}{
"cpe": [
"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"cpe:2.3:a:mattermost:mattermost_server:11.4.0:*:*:*:*:*:*:*"
],
"source": [
"CPE_RANGE",
"CPE_STRING"
],
"extracted_events": [
{
"introduced": "10.11.0"
},
{
"fixed": "10.11.12"
},
{
"introduced": "11.2.0"
},
{
"fixed": "11.2.4"
},
{
"introduced": "11.3.0"
},
{
"fixed": "11.3.2"
},
{
"introduced": "11.4.0"
},
{
"last_affected": "11.4.0"
}
]
}