lit / lit/lit.dev

Remove unsafe-eval from CSP when Chrome supports worker CSP

Open
#550 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
TypeScript
Stars
142
Forks
230
PR merge metrics
No merged PRs in 30d

Description

Once https://crbug.com/1253267 is fixed (estimated Chrome M97) and that Chrome release rolls out widely, we can remove `unsafe-eval` from our main HTML CSP, and keep it enabled only for the worker script. This should substantially improve the policy security, since only the Playground worker will be able to execute WASM or eval JS, but it won't be able to do hardly anything else (such as calling the new GitHub token exchange API).

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by checking the Chrome issue for worker CSP support, then locate the main HTML CSP and the Playground worker script configuration. Done means unsafe-eval is removed from the main policy while remaining enabled only for the worker, after the required Chrome release is widely available.

Written by the indexing model from the issue text.

Assessment

Domain
security, web-dev
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.