Exploit for Improper Input Validation in Pyyaml

Seal Security — Python pip Example A minimal, intentionally...

CVE-2026-44795

CVE-2026-44795 affects Spinnaker (Cloud deployments/baking paths) where unsafe YAML processing bypasses safe deserialization via a non-safe constructor, enabling arbitrary Java class loading and remote code execution. Affected versions precede fixed releases and include 2026.1.0, 2026.0.3, 2025.4...

CVE-2026-44795 Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types

Spinnaker is an open source, multi-cloud continuous delivery platform. Prior to 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3, unsafe YAML processing bypasses safe deserialization when using CloudFormation deployments or CloudFoundry baking. The use of a non-safe constructor allows arbitrary loading...

docling-core vulnerable to Remote Code Execution via unsafe PyYAML usage

ImpactA PyYAML-related Remote Code Execution RCE vulnerability, namely CVE-2020-14343, is exposed in docling-core =2.21.0, 2.48.4 and, specifically only if the application uses pyyaml 5.4 and invokes doclingcore.types.doc.DoclingDocument.loadfromyaml passing it untrusted YAML data. PatchesThe...

PYSEC-2026-1366 Feast vulnerable to Deserialization of Untrusted Data

A high-severity remote code execution vulnerability exists in feast-dev/feast version 0.53.0, specifically in the Kubernetes materializer job located at feast/sdk/python/feast/infra/computeengines/kubernetes/main.py. The vulnerability arises from the use of yaml.load..., Loader=yaml.Loader to...

PYSEC-2026-1683 MS SWIFT Remote Code Execution via unsafe PyYAML deserialization

Description A Remote Code Execution RCE vulnerability exists in the modelscope/ms-swift project due to unsafe use of yaml.load in combination with vulnerable versions of the PyYAML library ≤ 5.3.1. The issue resides in the tests/run.py script, where a user-supplied YAML configuration file is...

PYSEC-2026-462 PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading

Summary The AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags such as !!js/function and !!js/undefined. This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can...

PYSEC-2026-393 Unsafe yaml deserialization in llama-hub

The OpenAPI and ChatGPT plugin loaders in LlamaHub aka llama-hub before 0.0.67 allow attackers to execute arbitrary code because safeload is not used for YAML...

GHSA-C8Q4-9H32-2WW8 Spinnaker has non-safe yaml deserialization, allowing RCE when using specific types

Impact There's an unsafe YAML processing vulnerability that bypasses safe deserialization. This impacts users when when performing: CloudFormation deployments CloudFoundry Baking The usage of a non-safe constructor use allows arbitrary loading of Java classes leading to RCE. Patches 2025.3.3,...

Deserialization of Untrusted Data

Overview Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the YAML processing. An attacker can execute arbitrary code by supplying crafted YAML input that triggers unsafe class loading during operations such as CloudFormation deployments or CloudFoundry...

GHSA-RPJ2-4HQ8-938G VCR.py: Arbitrary code execution via unsafe YAML deserialization of cassette files

Summary vcrpy deserializes YAML cassette files with PyYAML's object-constructing loader yaml.CLoader / yaml.Loader instead of the safe loader yaml.CSafeLoader / yaml.SafeLoader. A cassette containing a !!python/object/apply: or similar tag therefore executes arbitrary Python code the moment the...

VCR.py: Arbitrary code execution via unsafe YAML deserialization of cassette files

Summary vcrpy deserializes YAML cassette files with PyYAML's object-constructing loader yaml.CLoader / yaml.Loader instead of the safe loader yaml.CSafeLoader / yaml.SafeLoader. A cassette containing a !!python/object/apply: or similar tag therefore executes arbitrary Python code the moment the...

CVE-2026-52903

A deserialization of untrusted data vulnerability was found in ManageIQ. The YamlLoadAliases module overrides YAML.safeload to silently fall back to YAML.unsafeload in production when a Psych::DisallowedClass error occurs. An authenticated attacker with dialog import access can exploit this to...

k8sGPT has Prompt Injection through its k8sGPT-Operator

Summary In the auto-remediation pipeline, objecttoexecution.go was deserializing the AI-generated YAML directly into a Deployment object, but there was lack of validation from the original Deployment object. Details This issue was fixed after coordination with Alex Jones. PoC To minimize the...

CVE-2026-39890 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags such as !!js/function and !!js/undefined. This allows an attacker to craft a malicious YAML file that, when parsed,...

CVE-2026-39890

Prais onAI’s AgentService.loadAgentFromFile parses YAML with js-yaml without disabling dangerous tags (e.g., !!js/function, !!js/undefined), enabling attacker to upload a malicious agent definition and achieve remote code execution on the server. Affected software: PraisonAI (before 4.5.115). Roo...

CVE-2026-39890 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags such as !!js/function and !!js/undefined. This allows an attacker to craft a malicious YAML file that, when parsed,...

Deserialization of Untrusted Data

Overview PraisonAI is a PraisonAI is an AI Agents Framework with Self Reflection. PraisonAI application combines PraisonAI Agents, AutoGen, and CrewAI into a low-code solution for building and managing multi-agent LLM systems, focusing on simplicity, customisation, and efficient human-agent...

GHSA-32VR-5GCF-3PW2 PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading

Summary The AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags such as !!js/function and !!js/undefined. This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can...

Deserialization of Untrusted Data

Overview praisonai is a PraisonAI TypeScript AI Agents Framework - Node.js, npm, and Javascript AI Agents Framework Affected versions of this package are vulnerable to Deserialization of Untrusted Data through the YAML deserialization in the loadAgentFromFile function. An attacker can execute...