CVE-2026-45807: kestra before 1.0.43 (exclusive), from 1.1.0 (inclusive), before 1.3.19 (exclusive), < 1.0.43, >= 1.1.0, < 1.3.19

Affected technology

kestra · before 1.0.43 (exclusive)
kestra

kestra · from 1.1.0 (inclusive), before 1.3.19 (exclusive)
kestra

kestra · < 1.0.43, >= 1.1.0, < 1.3.19
kestra-io

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

So an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants' execution outputs, etc.). Vendor/CNA’s CVSS 3.1 assessment (base score 7.7/10) rates confidentiality impact as high; integrity and availability impact as none.