{"id":81138,"date":"2026-06-27T00:24:08","date_gmt":"2026-06-26T20:54:08","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-53576-kestra-unauthenticated-rce-via-configs-path-suffix-auth-filter-bypass\/"},"modified":"2026-06-27T00:24:08","modified_gmt":"2026-06-26T20:54:08","slug":"cve-2026-53576-kestra-unauthenticated-rce-via-configs-path-suffix-auth-filter-bypass","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-53576-kestra-unauthenticated-rce-via-configs-path-suffix-auth-filter-bypass\/","title":{"rendered":"CVE-2026-53576 &#8211; Kestra: Unauthenticated RCE via \/configs path-suffix auth-filter bypass"},"content":{"rendered":"<p>CVE ID :CVE-2026-53576<\/p>\n<p>  Published : June 26, 2026, 8:54 p.m. | 51\u00a0minutes ago<\/p>\n<p>  Description :Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter(&#8220;\/api\/v1\/**&#8221;)) treats any request whose path ends in \/configs as the public instance-config endpoint and forwards it without a credential check. kestra addresses its resources by URL path segments that the caller chooses (\/api\/v1\/{tenant}\/flows\/{namespace}, \/api\/v1\/{tenant}\/executions\/{namespace}\/{id}, \/api\/v1\/{tenant}\/namespaces\/{namespace}\/kv\/{key}). An anonymous caller picks the literal configs as the final segment, and the request bypasses Basic-Auth entirely. Because the bypass reaches the flow-create and execution-trigger routes, an unauthenticated caller creates a flow containing a Shell or Process task and runs it. The task executes as root inside the kestra container. The official docker-compose.yml mounts \/var\/run\/docker.sock, so root in the container reaches the host Docker daemon. This vulnerability is fixed in 1.0.45 and 1.3.21.<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-53576 Published : June 26, 2026, 8:54 p.m. | 51\u00a0minutes ago Description :Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter(&#8220;\/api\/v1\/**&#8221;)) treats any request whose path ends in \/configs as the public instance-config endpoint and forwards it without a credential check. kestra &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-81138","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=81138"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81138\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=81138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=81138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=81138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}