EUVD-2026-13424
GHSA-j94x-8wcp-x7hm
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
Kargo manages and automates the promotion of software artifacts. In versions 1.4.0 through 1.6.3, 1.7.0-rc.1 through 1.7.8, 1.8.0-rc.1 through 1.8.11, and 1.9.0-rc.1 through 1.9.4, the http and http-download promotion steps allow Server-Side Request Forgery (SSRF) against link-local addresses, most critically the cloud instance metadata endpoint (169.254.169.254), enabling exfiltration of sensitive data such as IAM credentials. These steps provide full control over request headers and methods, rendering cloud provider header-based SSRF mitigations ineffective. An authenticated attacker with permissions to create/update Stages or craft Promotion resources can exploit this by submitting a malicious Promotion manifest, with response data retrievable via Promotion status fields, Git repositories, or a second http step. This issue has been fixed in versions 1.6.4, 1.7.9, 1.8.12 and 1.9.5.
Analysis
Kargo versions 1.4.0-1.6.3, 1.7.0-1.7.8, 1.8.0-1.8.11, and 1.9.0-1.9.4 contain a Server-Side Request Forgery vulnerability in http and http-download promotion steps that allows authenticated attackers to access cloud instance metadata endpoints and exfiltrate sensitive credentials like IAM keys. An attacker with permissions to create or modify Stages or Promotion resources can exploit this by crafting malicious manifests with full control over request headers and methods, bypassing cloud provider SSRF protections. …
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Remediation
Within 30 days: Identify affected systems running versions 1.4.0 and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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