{"id":"CVE-2026-49869","published":"2026-06-26T22:16:32Z","modified":"2026-10-25T17:10:00Z","title":"Kestra OSS OS Command Injection Vulnerability","vendor":"Kestra","product":"Kestra OSS","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"Kestra OSS, the open-source event-driven orchestration platform, has an authentication bypass in its AuthenticationFilter component, which exempts any API path ending in \"/configs\" from Basic Auth because it matches by suffix rather than exact path. An unauthenticated remote attacker, requiring only network access to the Kestra API and no credentials or user interaction, can create and run workflows that use the script execution plugins enabled by default, gaining command execution as root inside the Kestra worker container.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T08:31:46Z"},"cvss":{"score":10.0,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.02095,"percentile":0.8164,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-09-02","dueDate":"2026-09-05","ransomware":false,"requiredAction":"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.","notes":"This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-49869","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-08-26","exploitedFirstSeen":"2026-08-26","ransomware":false,"evidence":[{"url":"https://www.microsoft.com/en-us/security/blog/2026/08/26/when-ai-infrastructure-becomes-target-securing-gateways-control-points/","date":"2026-08-26"},{"url":"https://previdian.com/CVE-2026-49869","date":"2026-09-02"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-09-02"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":39,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"},{"id":"CWE-184","name":"Incomplete List of Disallowed Inputs"},{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx","tags":["Exploit","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated remote exploitation of exposed web API","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials","start":380,"end":493}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Script plugins yield command and script execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container","start":616,"end":721}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-39922","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39922","exploited":true,"exploitedSince":"2026-09-02","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":2,"skipped":0,"earliest":"2026-06-30","earliestUrl":"https://github.com/Ap0dexMe0/CVE-2026-49869","repos":[{"name":"EQSTLab/CVE-2026-49869","url":"https://github.com/EQSTLab/CVE-2026-49869","stars":4,"created":"2026-09-29"},{"name":"Ap0dexMe0/CVE-2026-49869","url":"https://github.com/Ap0dexMe0/CVE-2026-49869","stars":3,"created":"2026-06-30"}]},"first":{"date":"2026-06-30","source":"PoC-in-GitHub","url":"https://github.com/Ap0dexMe0/CVE-2026-49869"},"provenance":"source"},"exploitRefs":["https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2026-06-26","kind":"published","label":"Published 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