gleam-lang/gleam

Warn when a vulnerable package version is added as a dependency

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#5,725 opened on May 18, 2026

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help wanted

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Description

Hex now contains information on CVEs that we can use to display warnings when used. Let's use this information to display a warning when a newly resolved version of a dependency is vulnerable.

We could also have a command for showing vulnerabilities for the current package versions.

Reference implementation for Elixir: https://github.com/hexpm/hex/pull/1150

Contributor guide

Research direction
Examine how Hex collects and provides CVE data, then implement a warning in Gleam's dependency resolver that checks resolved versions against known vulnerabilities.
Tech stack
rustelixir
Domain
backendsecurity
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GleamRustHex package managerCVEs
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40