← Vulnerability feed

Vulnerability record · CVE-2026-53576 · published 26 June 2026

CVE-2026-53576: Kestra code injection vulnerability

Kestra · Kestra

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("/api/v1/**")) 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.

10.0 CVSS 3.1 Critical EPSS 3.3% · top 11.9% CWE-94 · Code injectionCWE-288 · Authentication bypass via alternate path
10.0CVSS 3.1 base score
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
1 Jul 2026Last modified by NVD

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("/api/v1/**")) 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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/kestra-io/kestra/security/advisories/GHSA-2q47-568g-9h4f ExploitVendor Advisory
https://github.com/kestra-io/kestra/security/advisories/GHSA-2q47-568g-9h4f ExploitVendor Advisory

Track CVE-2026-53576 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-49869Kestra OSS auth bypass via path suffix match enables RCEKestra OSS AuthenticationFilter whitelists the public config endpoint using request.getPath().endsWith("/configs"), a suffix match instead of an exac…KEVEPSS 2.1%analysed9.8CVE-2026-38428Kestra sql injection vulnerabilityKestra v1.3.3 and before is vulnerable to SQL Injection. The vulnerability occurs because user-controlled input from a GET parameter is directly conc…EPSS 0.52%9.0CVE-2026-34612Kestra sql injection vulnerabilityKestra is an open-source, event-driven orchestration platform. Prior to version 1.3.7, Kestra (default docker-compose deployment) contains a SQL Inje…EPSS 0.69%8.7CVE-2026-55069Kestra vulnerabilityKestra is an open-source, event-driven orchestration platform. Prior to 1.3.24, this vulnerability exists in the BasicAuth authentication component o…EPSS 0.24%7.7CVE-2026-49984Kestra path traversal vulnerabilityKestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.23, the local internal-storage backend validates user-supplied…EPSS 0.57%7.7CVE-2026-45807Kestra path traversal vulnerabilityKestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from t…EPSS 0.57%6.5CVE-2026-53577Kestra incorrect authorization vulnerabilityKestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the previewFileFromExecution endpoint (GET /api/v1/{tenant…EPSS 0.44%5.4CVE-2026-33664Kestra cross-site scripting vulnerabilityKestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields — des…EPSS 0.34%

Source: NIST National Vulnerability Database (record CVE-2026-53576), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.