CVE-2026-49869 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2026-09-05.
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.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 2.1% — more likely to be exploited than 81% of all CVEs |
| Weakness | CWE-78 |
| On CISA KEV | yes — remediate by 2026-09-05 |
| Public exploit | none known |
| Published | 2026-06-26 |
| Last modified | 2026-09-03 |
CISA KEV
| Name | Kestra OSS OS Command Injection Vulnerability |
|---|---|
| Added | 2026-09-02 |
| Due | 2026-09-05 |
| Vendor / product | Kestra / Kestra OSS |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| kestra | kestra |
References
→ the Explorer · watch your stack · NVD