NIXPKGS-2026-2416

GitHub issue published 1 week, 4 days ago

Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata

Permalink CVE-2026-73247

8.6 HIGH

CVSS version (CVSS): 3.1
Attack Vector (AV): Network (N)
Attack Complexity (AC): Low (L)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Scope (S): Changed (C)
Confidentiality (C): High (H)
Integrity (I): None (N)
Availability (A): None (N)
Modified Attack Vector (MAV): Network (N)
Modified Attack Complexity (MAC): Low (L)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): High (H)
Modified Scope (MS): Changed (C)
Modified Integrity (MI): None (N)
Modified Availability (MA): None (N)

updated 1 week, 4 days ago by @LeSuisse Activity log

Created suggestion 1 week, 5 days ago
@LeSuisse accepted 1 week, 4 days ago
@LeSuisse published on GitHub 1 week, 4 days ago

Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata

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.