comerc

Classification basis

The artifact is a blog post/writeup providing a technical analysis of payload withheld. It contains no executable exploit or scanner code. The author explicitly states 'Мы намеренно не публикуем здесь готовый эксплойт' (We intentionally do not publish a ready-to-use exploit here).

Requirements

• User-controlled data containing an 'lc' key must be serialized by dumps() or dumpd() and later deserialized by load() or loads().README.md:29-31
• The attacker must be able to influence fields like additional_kwargs or response_metadata, often via prompt injection.README.md:23

Observed behavior

• The document describes how an attacker can craft a dictionary with an 'lc' key to be treated as a legitimate LangChain object during deserialization, leading to secret extraction from environment variables or instantiation of objects from an allowlist.README.md:29-31README.md:107-121
• The writeup mentions a specific exfiltration path using ChatBedrockConverse to make a GET request with an attacker-controlled endpoint and an environment variable in a header.README.md:125-129
• The author states that a ready-to-use exploit is intentionally not published to give security teams time to patch.README.md:131

Observables

Vulnerability Disclosure

Payload withheldThe document describes a serialization injection vulnerability in LangChain's dumps()/dumpd() functions.README.md:1-265

Marketing Content

Payload withheldThe document includes promotional content for a security product called Cyata, describing its features for AI risk management.README.md:193-257