CVE-2026-49869 — Kestra — Fixed in 1.0.45 / 1.3.21
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.
Fixed versions
Choose the version for your installed product and release branch.
| Product | Fixed versions |
|---|---|
| Kestra | 1.0.45 / 1.3.21 |
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Sep 2, 2026
- US federal agencies must remediate it by Sep 5, 2026 (BOD 22-01)
- First attack observed 60 days after disclosure
- Confirmed by sensors, not only by reports
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.
Source: CISA KEV · Oct 18, 2026 Oct 16, 2026 Oct 14, 2026 Oct 13, 2026 Oct 12, 2026 Oct 11, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| kestra | kestra | < 1.0.45 |
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