---
id: CVE-2026-73247
title: 'Kestra is an open-source, event-driven orchestration platform'
summary: >-
  Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0,
  Kestra's
  core/src/main/java/io/kestra/core/runners/pebble/functions/HttpFunction.java
  passes the user-controlled http() uri argument to URI.create() and the s…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
published: '2026-08-11'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:50:00.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73247'
references:
  - url: >-
      https://github.com/kestra-io/kestra/security/advisories/GHSA-r56g-q4p6-m3p6
    label: security-advisories@github.com
  - url: >-
      https://github.com/kestra-io/kestra/security/advisories/GHSA-r56g-q4p6-m3p6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73247'
  - url: 'https://github.com/advisories/GHSA-r56g-q4p6-m3p6'
tags:
  - nvd
  - ghsa
  - maven
epss: 0.00368
epssPercentile: 0.30664
ingestedAt: '2026-09-09T21:22:45.530Z'
aliases:
  - GHSA-r56g-q4p6-m3p6
ecosystem: maven
vendor: kestra
product: 'io.kestra:core'
affected:
  - 'io.kestra:core <= 1.3.31'
  - 'io.kestra:kestra-core < 2.0.0'
patched:
  - 'io.kestra:kestra-core 2.0.0'
---

## Overview

Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0, Kestra's core/src/main/java/io/kestra/core/runners/pebble/functions/HttpFunction.java passes the user-controlled http() uri argument to URI.create() and the server-side HTTP client without restricting private, loopback, or link-local destinations, allowing an unauthenticated attacker to import and execute a flow that accesses internal services or cloud metadata.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-73247)

Affected packages:

- `io.kestra:core <= 1.3.31`
- `io.kestra:kestra-core < 2.0.0`

Patched in:

- `io.kestra:kestra-core 2.0.0`

Source: https://github.com/advisories/GHSA-r56g-q4p6-m3p6