{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/73293?format=json","vulnerability_id":"VCID-znnp-87re-1qbz","summary":"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 validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint.. Mattermost Advisory ID: MMSA-2026-00638","aliases":[{"alias":"CVE-2026-4646"}],"fixed_packages":[],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-4646","reference_id":"","reference_type":"","scores":[{"value":"0.00069","scoring_system":"epss","scoring_elements":"0.21396","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00069","scoring_system":"epss","scoring_elements":"0.2158","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00069","scoring_system":"epss","scoring_elements":"0.21594","published_at":"2026-06-13T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-4646"},{"reference_url":"https://mattermost.com/security-updates","reference_id":"security-updates","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-22T12:13:12Z/"}],"url":"https://mattermost.com/security-updates"}],"weaknesses":[{"cwe_id":1287,"name":"Improper Validation of Specified Type of Input","description":"The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type."}],"exploits":[],"severity_range_score":"4.3 - 4.3","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-znnp-87re-1qbz"}