CVE-2026-49869

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.

CVSS v3.1 Score

10.0

CRITICAL

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

EPSS — Exploit Prediction

0.0068

Probability of exploitation

0.48%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-78 OS Command Injection

CWE-184 CWE-184

CWE-287 Improper Authentication

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
kestra	kestra	< 1.0.45
kestra	kestra	1.1.0 — 1.3.21

References

Advisories & Patches

https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx

Exploits

https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx

Frequently Asked Questions

What is CVE-2026-49869? +

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. It has a CVSS v3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2026-49869? +

CVE-2026-49869 has a CVSS v3.1 score of 10.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0068, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-49869? +

CVE-2026-49869 affects products from kestra, specifically: kestra. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-49869? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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