{"cve":"CVE-2026-40077","nvd":{"published":"2026-04-09T20:16:27.230","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"Beszel is a server monitoring platform. Prior to 0.18.7, some API endpoints in the Beszel hub accept a user-supplied system ID and proceed without further checks that the user should have access to that system. As a result, any authenticated user can access these routes for any system if they know the system's ID. System IDs are random 15 character alphanumeric strings, and are not exposed to all users. However, it is theoretically possible for an authenticated user to enumerate a valid system ID via web API. To use the containers endpoints, the user would also need to enumerate a container ID, which is 12 digit hexadecimal string. This vulnerability is fixed in 0.18.7.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":3.1},"cwes":["CWE-184"],"references":["https://github.com/henrygd/beszel/releases/tag/v0.18.7","https://github.com/henrygd/beszel/security/advisories/GHSA-5f5r-95pg-xrpm"],"products":["beszel:beszel"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-40077","score":0.00219,"percentile":0.12342,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-5f5r-95pg-xrpm","url":"https://osv.dev/vulnerability/GHSA-5f5r-95pg-xrpm","summary":"Beszel has an IDOR in hub API endpoints that read system ID from URL parameter","modified":"2026-06-25T18:56:11.805485165Z","packages":[{"ecosystem":"Go","name":"github.com/henrygd/beszel","purl":"pkg:golang/github.com/henrygd/beszel","ranges":["<0.18.7"],"fixed":["0.18.7"]}]},{"id":"GO-2026-5141","url":"https://osv.dev/vulnerability/GO-2026-5141","summary":"Beszel has an IDOR in hub API endpoints that read system ID from URL parameter in github.com/henrygd/beszel","modified":"2026-06-25T18:45:26.450962147Z","packages":[{"ecosystem":"Go","name":"github.com/henrygd/beszel","purl":"pkg:golang/github.com/henrygd/beszel","ranges":["<0.18.7"],"fixed":["0.18.7"]}]}],"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."]}