Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

Security Concern: Unrestricted S3 Access in Titiler Policy

Open
#40 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Refactor
Clarity
Mostly clear
Activity status
Stale
Tech stack
aws
Domain
cloud, security

Research direction

Read sam.yml at line 57 and inspect the AWSLambdaExecute policy statement first. Determine the Lambda's required S3 resources from the template and narrow the permissions accordingly; done means the function no longer has unrelated bucket-wide access.

Written by the indexing model from the issue text.

Description

The CloudFormation template (sam.yml) you provided grants the Lambda function unrestricted access to all S3 buckets through the policy associated with the AWSLambdaExecute statement. This presents a significant security risk, as the application might unintentionally access or modify data in buckets unrelated to its intended operations. This could potentially expose sensitive information or disrupt critical business processes.

  • Recommendations:
    1. Refactor the policy: Use a least privilege approach by specifying the exact S3 buckets the function requires access to instead of using wildcards (*).
    2. Consider IAM roles: Utilize IAM roles to grant specific permissions to the Lambda function instead of relying on the broader AWSLambdaExecute policy.
Dominant language
Python
Stars
17
Forks
4
PR merge metrics
No merged PRs in 30d

Contributor guide

No contributing guide indexed for this repository

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.

Similar issues

More Python issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.