An Exciting New Chapter for MyGet

Today we are thrilled to announce that MyGet has been acquired by Assembla.

We started MyGet in 2011 with the goal of providing the market a package-management service that truly stood out above the others.

In that time, and with the help of our amazing customers, we were able to grow MyGet to 40,000 users. This has been in no small way related to the success our clients have had in their business pursuits.

While we’ve enjoyed the ride, it’s time for us to start something new. Earlier this year, we were introduced to the team at Assembla, and in our discussions with them, we realized that Assembla is the perfect home for MyGet.

Why we made this decision

Making the decision to partner with Assembla and ultimately have them acquire MyGet was not easy, but it made sense. It is always difficult to let go of something you built from the ground up. But at the end of the day, we knew that Assembla would be able to provide MyGet and our customers with resources to take their code and businesses to the next level.Assembla has the knowledge and experience to run a Software-as-a-Service, and having developer tools experience themselves, we know that this will benefit MyGet customers.

Resources and knowledge share

Assembla is part of the Scaleworks family, a venture equity fund dedicated to acquiring and growing B2B, SaaS, cloud-based businesses. We know that as part of the Scaleworks family, MyGet will have access to a knowledge share it otherwise wouldn’t, and that we truly believe will serve our customer base well.

Security first

One of the primary reasons we decided to go with Assembla is because of their security-first mind-set. With a source code management tool built for the enterprise and a focus on shifting security to the left, we know that our customers will be in good hands.

What it means for our customers

For our current customers, we want to communicate that no action will be needed on your part. You will be receiving communication from the Assembla team regarding updates to the support channel, but you will not be required to do anything. Should you have any issues, please reach out to support at

We are excited to see the growth that this acquisition will bring for MyGet and our customers.

Stay tuned for what’s to come!

Author: Maarten Balliauw & Xavier Decoster on 31 Aug 2018

New Website/App Look and Feel

We are excited to announce that, the login page, and the app will be getting an updated look and feel by the end of this week!

Nothing in the app will move and all functionality will remain the same. You’ll simply see some color and styling changes to the app and website.

To give you a sneak peek of of what you’ll be seeing, we’ve put together some preview shots.

We look forward to sharing the newly designed MyGet experience with you very soon. Feel free to send questions to


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Author: Maarten Balliauw on 29 Aug 2018

NPM security advisory

TL;DR: If you are using NPM and have installed the package eslint-scope 3.7.2, we recommend you to revoke your MyGet access tokens.

Security Advisory

At MyGet, we’re always closely monitoring security events in the package management space, and we want you to be aware of a vulnerability incident that hit npm users today. The full incident report can be read on the status page.

A well-known popular npm package, eslint-scope (version 3.7.2) was published without authorization, and apparently contained malicious code that attempted to steal npm login tokens.

It has been unpublished from, and a post-mortem has been published by the eslint team.

We have scanned all MyGet feeds for this package, and have informed affected feed owners personally.

Nevertheless, if you are using NPM and are consuming the eslint-scope package, no matter whether from directly or proxied through MyGet, we recommend to:

  • Verify your feeds for affected packages, and remove them.
  • Revoke or regenerate your MyGet access tokens at once. Access tokens can be managed from your MyGet profile page.
  • Update your MyGet credentials from your MyGet account page.
  • If you push packages to via an upstream source, you’ll need to update your access token in the upstream source configuration.

Happy packaging!

Author: Xavier Decoster on 13 Jul 2018

Accidental account deleted notification - what happened

On May 17, 2018, a subset of 2.500 MyGet users accidentally received an automated e-mail informing their account was deleted due to inactivity (while no user data was in fact, removed). We want to apologize for this accidental e-mail, and detail our investigation into why this happened.

Since a couple of weeks, we are tracking inactive users on our free plan, for two reasons. First, of course, it would be nice if those users become active again, and maybe even upgrade to a paid subscription. Second, as part of our efforts in ensuring user privacy, we want to ensure we don’t keep user data around for users who are no longer using our service.

There are two processes involved in this, let’s call them Flag and RemoveIncomplete.

The Flag job checks existing users and their subscription, and informs inactive users how they can keep their account active (or let it expire after a further 30 days of inactivity). When looking at the accidental e-mails, they all looked like they were sent by the Flag job, which is also what we communicated with affected users on May 17, 2018.

Further investigation learns the RemoveIncomplete was responsible for these accidental e-mails.

Let’s look at something else first. When clicking the Microsoft Account or GitHub identity provider on the MyGet login screen, we create a temporary profile without a username. The first step after the first login is for our user to pick their desired username. If they don’t, the user profile is deemed “incomplete” as there is no username attached to it. It’s this type of profiles the RemoveIncomplete job removes.

Under the hood, this job uses the same code we use to remove a user profile when requested by the user. As a confirmation, we send the user an e-mail when removal is finished. It’s this type of e-mail that was sent by the RemoveIncomplete job.

Users all of a sudden received e-mail stating their account was deleted and panicked. Adding to the confusion, no username was mentioned in the e-mail.

The RemoveIncomplete job successfully removed incomplete user profiles. It should never send out e-mails, but a recent code change had disabled that check. Which translated into many users getting an “account was removed” e-mail without the username being included (as there is no username in an incomplete user profile).

So why did some existing users receive an e-mail if it’s only incomplete user profiles being removed? The answer to that is fairly simple. All of the users that received the accidental e-mail, received it because they had an incomplete profile next to their actual profile:

  • User profile id:12345, username:<null>, - deleted and e-mailed
  • User profile id:54321, username:example, - unaffected and still active

In this case, user id:12345 was removed (because there was no username attached to it), and accidentally sent an e-mail. User id:54321 is still active and unaffected.

We again want to apologize for the confusion this caused, and have updated our codebase to not send out e-mails in this case, and added relevant unit tests to prevent this from happening again.

Happy packaging!

Author: Xavier Decoster on 28 May 2018

MyGet symbol server helps mitigate CVE-2018-1037

On April 10, 2018, Microsoft released a security update, CVE-2018-1037 , describing how Visual Studio can improperly disclose limited contents of uninitialized memory while compiling program database (PDB) files.

The memory leaked is limited to typically low-risk variables used in the application build environment, and only information that the Visual Studio executable uses when compiling projects. If your PDB/symbol files are shared publicly, this information could be extracted.

Visual Studio versions have been patched, so we recommend installing the latest security updates for your Visual Studio version.

While the security issue is unlikely to be exploited, KB4131751 was released to verify existing PDB files. Symbols served from MyGet symbols feeds are automatically checked for this vulnerability, and updated when necessary.

This security fix is gradually rolling out across all of our deployments.

Happy packaging!

Author: Maarten Balliauw on 18 Apr 2018

Deprecating Facebook, OpenID and StackExchange login to MyGet

TL;DR: MyGet will retire Facebook, OpenID and StackExchange login to MyGet on March 9, 2018.

Historically, MyGet has been using the Microsoft Azure Access Control Service (ACS). It allowed our users to easily create a MyGet account from an existing third-party login system, like Microsoft Account, Google Account, GitHub authentication, …

With Microsoft sunsetting the ACS service and having to migrate to a different service, we are re-evaluating which third-party login types we want to provide in the future. Right now, only a handful of our users are actively making use of the Facebook, OpenID and StackExchange authentication providers, which prompted us to retire these three providers. MyGet will retire Facebook, OpenID and StackExchange login to MyGet on March 9, 2018.

Affected users have been notified about this via e-mail.

If you are making use of Facebook, OpenID or StackExchange to login to MyGet, it’s always possible to use another third-party identity provider, like Google Account or GitHub. You can link these via your MyGet user profile.

Of course, you can always keep using your MyGet username/password combination to login to MyGet.

Happy packaging!

Author: Maarten Balliauw on 22 Feb 2018

MyGet 2017.2 Release Notes

We are happy to announce MyGet 2017.2 was released on December 13, 2017! Full release notes are available from our docs.


Next to some new features and many fixes, this 2017.2 release of MyGet again adds some new functionality to the service.

Major highlights of this release are:

  • We added PHP Composer support, and welcome PHP developers to the MyGet family! (Announcement | Docs)

    In fact, this also resulted in a bug fix on Composer itself (which is now merged, yay!) - composer/composer#6717 will be part of Composer 1.5. Happy to contribute back!

  • In light of upcoming EU General Data Protection Regulation (EU GDPR), which will be enforced in May 2018, MyGet is taking proactive action to verify we are compliant, and take corrective measures if we spotted anything that is not compliant, or questionable (typical grey area in legislation). Being a EU-based company, we take privacy and security very seriously! As such, we focused in this release to ensure that:

    • user sign-ups by default opt-out of marketing communications or newsletters; unless the user explicitly takes positive action by ticking the checkbox to opt-in (which of course we do recommend, as we try to keep you informed about evolutions and guidance in the package management space)
    • first-time visitors see a proper cookie consent banner, requiring so-called double consent from the user (in other words: we ask you to explicitly accept/deny non-essential cookies instead of the automatic consent with cookies you see elsewhere on the Internet)
    • we verified our usage of essential and non-essential cookies and ensure we comply to GDPR in the way we handle these
    • we don’t retain any personally identifiable information (PII) data longer than necessary and only use it for the purposes intended (full details in our Terms of Service and Privacy Policy)

    As data protection is critical, MyGet can help organizations in protecting them against potential vulnerabilities imposed by third-party or open source dependencies using the built-in vulnerability report on each feed. More GDPR-specific changes are coming to MyGet as we continuously deploy our services, and will be aggregated in the 2018.1 release notes.

  • Another big theme we focused on lately is auditing. Similar to our activity streams, we made security related events accessible in an easy to use audit log to MyGet Enterprise administrators. (Announcement) In addition, we allow an export of these audit logs into a downloadable .csv file containing up to 25.000 entries.


Full release notes with a list of all features and fixes are available from our docs.

We love hearing from you, so keep that feedback coming! MyGet is built for you!

Happy packaging!

Author: Xavier Decoster on 13 Dec 2017

Inspecting audit logs in MyGet Enterprise

A couple of weeks back, we released an audit log viewer on MyGet Enterprise. Administrators of a MyGet Enterprise plan can inspect every action that happens on their MyGet instance and see who did what, when, and where.

From the MyGet Enterprise administration dashboard, all actions performed on the Enterprise installation can be consulted:

The list of audit entries is searchable and can be exported to a CSV file so additional querying can be done in, for example, Excel. Details for each audit entry can be consulted and display the action that was performed, who performed it, and where it was executed. We can also see the location the user performed the action from, including the IP address (last octet always 0 for privacy reasons).

With audit logs available on MyGet Enterprise, we are confident MyGet can help larger teams and enterprises with auditing and dependency lifecycle management.

Happy packaging!

Author: Maarten Balliauw on 16 Nov 2017