{"id":"CVE-2026-100394","aliases":[],"cve":{"records":[{"id":"CVE-2026-100394","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T20:08:33.083Z","published":"2026-10-14T15:38:47.079Z","modified":"2026-10-29T14:39:43.451Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-14T15:38:47.079Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T14:39:43.451Z"}],"references":[{"url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-qjpp-gffx-2wm9","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/nezhahq/nezha/commit/c893aa57867d8a3d608e2f2f16d1594c9766cdf3","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/nezhahq/nezha/releases/tag/v2.2.11","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/nezhahq/nezha/releases/tag/v2.3.0","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-qjpp-gffx-2wm9","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","source":"GitHub_M"},{"id":"CWE-476","description":"CWE-476: NULL Pointer Dereference","source":"GitHub_M"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T14:39:36.650648Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Nezha Monitoring: Whole-instance DoS in Nezha dashboard: a member can crash the process for every tenant","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From 2.2.7 until 2.2.11, ServiceSentinel.worker in service/singleton/servicesentinel.go checked an owned service under servicesLock and later dereferenced pointer-valued serviceStatusToday and serviceCurrentStatusData entries under serviceResponseDataStoreLock without revalidating that ServiceSentinel.Delete had not removed them. A RoleMember could concurrently report TCP or ICMP results through the member's own agent and delete the same owned service, causing a nil pointer dereference. Because the gRPC server had no recovery interceptor, the worker panic terminated the whole dashboard process and disrupted every tenant's web interface, REST API, and agent connections. The issue affects availability only and does not disclose or modify data. This issue is fixed in versions 2.2.11 and 2.3.0.","score":6.5,"severity":"medium","published":"2026-10-14T15:38:47.079Z","modified":"2026-10-29T14:39:43.451Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"nezhahq","name":"nezha","platforms":[],"versions":[{"version":">= 2.2.7, < 2.2.11","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-100394"}],"remediation":[],"references":["https://github.com/nezhahq/nezha/security/advisories/GHSA-qjpp-gffx-2wm9","https://github.com/nezhahq/nezha/commit/c893aa57867d8a3d608e2f2f16d1594c9766cdf3","https://github.com/nezhahq/nezha/releases/tag/v2.2.11","https://github.com/nezhahq/nezha/releases/tag/v2.3.0"],"sources":[{"name":"CVE","id":"CVE-2026-100394","modified":"2026-10-29T14:39:43.451Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-100394"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5}],"sourceAffected":[],"observedAt":"2026-10-29T15:15:04.907Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T10:50:31.656Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T15:40:32.632Z","attemptedAt":"2026-10-29T15:40:32.632Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T15:40:33.028Z","attemptedAt":"2026-10-29T15:40:33.028Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T15:40:35.410Z","attemptedAt":"2026-10-29T15:40:35.410Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-29T15:40:32.594Z","attemptedAt":"2026-10-29T15:40:32.594Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-100394","url":"https://www.first.org/epss/","probability":0.00424,"percentile":0.36625,"date":"2026-10-29","checkedAt":"2026-10-29T15:40:32.594Z"},{"source":"NVD","id":"CVE-2026-100394","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100394","modified":"2026-10-29T15:17:14.443","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-29T15:40:32.632Z"},{"source":"GitHub Advisory Database","id":"GHSA-qjpp-gffx-2wm9","url":"https://github.com/advisories/GHSA-qjpp-gffx-2wm9","modified":"2026-10-15T20:15:07Z","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-29T15:40:33.028Z"},{"source":"ENISA EUVD","id":"EUVD-2026-101303","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101303","modified":"Oct 29, 2026, 2:39:43 PM","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-29T15:40:35.410Z"}],"aiSummary":{"text":"Nezha Monitoring versions 2.2.7 to 2.2.11 have a weakness that allows a RoleMember to crash the dashboard process, disrupting all tenants' access. This occurs due to a race condition and null pointer dereference. The issue affects availability only.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:32:57.580Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-100394"}]}}