AIKIDO-2026-739614
core is vulnerable to Server-Side Request Forgery (SSRF)
86
High Risk
This Affects:
coreTL;DR
Kestra's Pebble template engine provides an http() function that passes a user controlled URL to URI.create() and fetches it with no scheme, IP, or destination checks. A user who can author or trigger a flow can reach internal services, loopback addresses, and cloud metadata endpoints such as 169.254.169.254, exposing credentials and internal APIs. The fix validates URLs and blocks private, loopback, and link-local destinations.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and untrusted users can author or trigger flows.
Background info
core is vulnerable to Server-Side Request Forgery (SSRF) in versions 0.2.0 - 1.3.38.
How to fix this
Upgrade the core and/or the io.kestra:kestra-core library to the patch version.
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