CVE-2026-49869
Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`
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 :
July 1, 2026, 12:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
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 |
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 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.
-
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