{"cve":"CVE-2026-4053","nvd":{"published":"2026-05-15T19:17:04.670","modified":"2026-06-17T10:55:54.517","status":"Analyzed","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce the PostEditTimeLimit on non-message post fields which allows an authenticated user to modify post file attachments, props, and pin status after the edit window has expired via the post patch and update API endpoints.. Mattermost Advisory ID: MMSA-2026-00631","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:L/A:N","score":4.3},"cwes":["CWE-672"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-4053","score":0.00165,"percentile":0.05655,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hw87-6jcq-9f8q","url":"https://osv.dev/vulnerability/GHSA-hw87-6jcq-9f8q","summary":"Mattermost doesn't enforce the PostEditTimeLimit on non-message post fields","modified":"2026-06-25T23:11:45.748685627Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=11.5.0 <11.5.2"],"fixed":["11.5.2"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=0.0.0-20250731163400-5b955468ea1e <0.0.0-20260414103857-b21ef302025e"],"fixed":["0.0.0-20260414103857-b21ef302025e"]}]},{"id":"GO-2026-5442","url":"https://osv.dev/vulnerability/GO-2026-5442","summary":"Mattermost doesn't enforce the PostEditTimeLimit on non-message post fields in github.com/mattermost/mattermost-server","modified":"2026-06-25T23:01:13.651626403Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=0.0.0-20250731163400-5b955468ea1e <0.0.0-20260414103857-b21ef302025e",">=11.5.0+incompatible <11.5.2+incompatible"],"fixed":["0.0.0-20260414103857-b21ef302025e","11.5.2+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."]}