gchq/CyberChef

bug(AMF Decode): Buffer exhausted while reading 8 bits at offset 0 via just empty input or newline

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#2,492 opened on Jun 4, 2026

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 (0 comments) (0 reactions) (0 assignees)JavaScript (34,843 stars) (3,944 forks)batch import
bughelp wanted

Description

To reproduce that extremly very simple, just drag AMF decode then you will see an uncaught error

AMF Decode - Error in https://gchq.github.io/CyberChef/modules/Encodings.js on line 2.<br><br>Message: Buffer exhausted while reading 8 bits at offset 0, context:
     - [ye] Ue#marker
     - [readField()] Ue#marker
     - [read()] Ue
     - [Ue.read()] Ue

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Contributor guide

Tech stack
javascript
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
GitJavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
Examine the AMF decode function to see how it handles empty input or newline; check for missing null/empty checks.