{"cve":"CVE-2025-14822","nvd":{"published":"2026-01-16T09:16:01.460","modified":"2026-06-17T08:36:36.453","status":"Analyzed","description":"Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-770","CWE-407"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2025-14822","score":0.00348,"percentile":0.28492,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9r42-rhw3-2222","url":"https://osv.dev/vulnerability/GHSA-9r42-rhw3-2222","summary":"Mattermost is vulnerable to CPU exhaustion via crafted HTTP request","modified":"2026-02-27T22:05:20Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.11.0 <10.11.9"],"fixed":["10.11.9"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=11.0.0 <11.2.0"],"fixed":["11.2.0"]}]},{"id":"GO-2026-4325","url":"https://osv.dev/vulnerability/GO-2026-4325","summary":"Mattermost is vulnerable to CPU exhaustion via crafted HTTP request in github.com/mattermost/mattermost-server","modified":"2026-02-26T18:55:59.006246Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=10.11.0+incompatible <10.11.9+incompatible",">=11.0.1+incompatible <11.2.0+incompatible"],"fixed":["10.11.9+incompatible","11.2.0+incompatible"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}