CVE-2026-4858
⚠️ highSummary
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640
CVSS Score
8.0
High
EPSS Score
0.1
Exploit Probability
Published Date
2026-05-21
First Seen: 2026-05-22
📊 Relative Risk Intelligence
This CVE is High Risk - more severe than 77.5% of all 325,703 vulnerabilities in our database.
#73,228
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 21, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
daw10
SSVC data provided by
CISA
Last Modified
2026-05-21
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CWE IDs (Weakness Types)