{"cve":"CVE-2026-55761","nvd":{"published":"2026-07-08T16:16:31.020","modified":"2026-07-10T17:48:26.790","status":"Analyzed","description":"Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. In versions 2.39.0 through 2.39.3 and 2.40.0 until 2.43.0, unauthenticated restore and administrator initialization endpoints (/api/restore and /api/users/admin/init) remain accessible during the five-minute setup window for uninitialized instances, allowing a network attacker to restore a crafted backup or create the first administrator account and gain full administrative access. This issue is fixed in versions 2.39.4 and 2.43.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9},"cwes":["CWE-287"],"references":["https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b","https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312","https://github.com/portainer/portainer/issues/2770","https://github.com/portainer/portainer/releases/tag/2.39.4","https://github.com/portainer/portainer/releases/tag/2.43.0"],"products":["portainer:portainer"],"source":"nvd","synced_at":"2026-10-19T22:42:16.820116992+00:00"},"epss":{"cve":"CVE-2026-55761","score":0.00493,"percentile":0.42361,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x626-fcwx-f5pc","url":"https://osv.dev/vulnerability/GHSA-x626-fcwx-f5pc","summary":"Portainer has Unauthenticated Restore Endpoint that Allows Admin Takeover on Uninitialized Instances","modified":"2026-09-02T19:55:44.937680570Z","packages":[{"ecosystem":"Go","name":"github.com/portainer/portainer","purl":"pkg:golang/github.com/portainer/portainer","ranges":[">=2.39.0 <2.39.4"],"fixed":["2.39.4"]},{"ecosystem":"Go","name":"github.com/portainer/portainer","purl":"pkg:golang/github.com/portainer/portainer","ranges":[">=2.40.0 <2.43.0"],"fixed":["2.43.0"]}]},{"id":"GO-2026-6324","url":"https://osv.dev/vulnerability/GO-2026-6324","summary":"Portainer has Unauthenticated Restore Endpoint that Allows Admin Takeover on Uninitialized Instances in github.com/portainer/portainer","modified":"2026-09-02T19:45:12.634762853Z","packages":[{"ecosystem":"Go","name":"github.com/portainer/portainer","purl":"pkg:golang/github.com/portainer/portainer","ranges":["all versions"],"fixed":[]}]}],"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."]}