CVE-2026-49869
Kestra OSS OS Command Injection Vulnerability - [Actively Exploited]
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.
INFO
Published Date :
June 26, 2026, 10:16 p.m.
Last Modified :
Sept. 3, 2026, 1:05 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.
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.
Unknown
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
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Kestra OSS to version 1.0.45 or later.
- Update Kestra OSS to version 1.3.21 or later.
Public PoC/Exploit Available at Github
CVE-2026-49869 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-49869.
| URL | Resource |
|---|---|
| https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx | Exploit Vendor Advisory |
| https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx | Exploit Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869 | US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-49869 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-49869
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Kestra Auth-Bypass Vulnerability Checker
kestra proof-of-concept rce
Python
Turn any LLM into an autonomous pentester. You define the scope, the agent does the work, you review the findings.
ai claude docker exegol hacking mcp pentesting security security-tools vulnerability-assessment ai-powered llm
Python Dockerfile JavaScript HTML CSS Shell Mako Jinja
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-49869 vulnerability anywhere in the article.
-
The Hacker News
CISA Adds Seven Exploited Flaws as Attackers Deploy Reverse Shells and Crypto Miners
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added seven security flaws to its Known Exploited Vulnerabilities (KEV) catalog after they landed in attackers' crosshairs ... Read more
-
TheCyberThrone
CISA Adds 7 Vulnerabilities to KEV: A New Wave of Actively Exploited Flaws
On September 2, 2026, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) added seven vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, marking another reminder that ... Read more
The following table lists the changes that have been made to the
CVE-2026-49869 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 03, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-02T17:44:16.457290Z'} {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-01T00:00:00+00:00'} -
Modified Analysis by [email protected]
Sep. 02, 2026
Action Type Old Value New Value Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869 Types: US Government Resource -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Sep. 02, 2026
Action Type Old Value New Value Added Date Added 2026-09-02 Added Due Date 2026-09-02 Added Required Action 2026-09-02 Added Vulnerability Name 2026-09-02 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 02, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869 Changed SSVC {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-01T00:00:00+00:00'} {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-02T17:44:16.457290Z'} -
CVE Modified by [email protected]
Sep. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Removed Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Removed Reference Type https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Removed Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Removed Reference Type https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Types: Exploit, Vendor Advisory Changed SSVC {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-29T13:19:46.640892Z'} {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-01T00:00:00+00:00'} -
Initial Analysis by [email protected]
Jul. 01, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.45 *cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:* versions from (including) 1.1.0 up to (excluding) 1.3.21 Added Reference Type GitHub, Inc.: https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 29, 2026
Action Type Old Value New Value Added Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx Added SSVC {'id': 'CVE-2026-49869', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-29T13:19:46.640892Z'} -
New CVE Received by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'kestra-io', 'product': 'kestra', 'versions': [{'status': 'affected', 'version': '< 1.0.45'}, {'status': 'affected', 'version': '>= 1.1.0, < 1.3.21'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-287 Added CWE CWE-78 Added CWE CWE-184 Added CWE CWE-918 Added Reference https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx