CVE-2026-49869

Published Jun 26, 2026

Last updated 2 months ago

Exploit known CVSS critical 10.0

Docker

Container Security

System

Supply chain

Kestra

Kestra OSS

plugin-script-shell

Overview

Description: Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a suffix match rather than an exact path match, any API path whose last segment is configs bypasses authentication entirely. An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials. Because Kestra ships with script execution plugins (plugin-script-shell, plugin-script-python, etc.) enabled by default, this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container. This vulnerability is fixed in 1.0.45 and 1.3.21.
Source: security-advisories@github.com
NVD status: Analyzed
Products: kestra

Risk scores

CVSS 3.1

Type: Secondary
Base score: 10
Impact score: 6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: Kestra OSS OS Command Injection Vulnerability
Exploit added on: Sep 2, 2026
Exploit action due: Sep 5, 2026
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

security-advisories@github.com: CWE-78

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "ADC0ED79-69EF-4A2A-9F07-4791ED97124F",
            "versionEndExcluding": "1.0.45",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "73FD0092-9076-4F1C-9B93-E59C09D30E21",
            "versionEndExcluding": "1.3.21",
            "versionStartIncluding": "1.1.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.