# [HIGH] Finding YAML Deserialization with Snyk Code

**Source:** Snyk
**Published:** 2023-02-23
**Article:** https://snyk.io/blog/finding-yaml-injection-with-snyk-code/

## Threat Profile

Snyk Blog In this article
Written by Calum Hutton 
February 23, 2023
0 mins read I conducted some research to try and identify YAML Injection issues in open-source projects using Snyk Code. Though the vulnerability itself is not a new one, the potential impact of YAML Injection is high, which made it a good candidate for research. This research led to the discovery of several issues in open-source projects written in Python, PHP and Ruby. This article focuses on the issue found in geokit-rails v…

## Indicators of Compromise (high-fidelity only)

- **CVE:** `CVE-2023-26153`

## MITRE ATT&CK Techniques

- **T1190** — Exploit Public-Facing Application

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

### IOC-driven hunts (use shared templates)

These are standard IOC-substitution hunts — the canonical SPL and KQL live once in [`_TEMPLATES.md`](../_TEMPLATES.md), so we don't repeat the same boilerplate on every CVE / hash / network-IOC briefing.

- **Asset exposure — vulnerability matches article CVE(s)** ([template](../_TEMPLATES.md#asset-exposure)) — phase: **recon**, confidence: **High**
  - CVE(s): `CVE-2023-26153`


## Why this matters

Severity classified as **HIGH** based on: CVE present, 1 use case(s) fired, 1 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.