Import from 1password .pux fails with Import error (both on Windows and web clients)

[datastory]

Steps To Reproduce

Try to import .pux export from 1password sized approx. 350 MB.

Expected Result

Data imported

Actual Result

Import fails (both on web vault and on Windows 11 desktop client) with error "memory access out of bounds".

Screenshots or Videos

Additional Context

No response

Operating System

Windows

Operating System Version

Windows 10

Installation method

Direct Download (from bitwarden.com)

Build Version

2025.11.2

Issue Tracking Info

• I understand that work is tracked outside of GitHub. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

[bitwarden-bot]

Thank you for reporting this issue! We've added this to our internal tracking system.
ID: PM-29170
Link (for internal use): https://bitwarden.atlassian.net/browse/PM-29170

[pamperer562580892423]

Another user here... And general tip (which probably also is meant for "file size" - but maybe it still is a bug you encountered here):

(--> https://bitwarden.com/help/import-data/#troubleshoot-import-errors)

[datastory]

@pamperer562580892423 Thanks for the tip, but my export is safely below all the mentioned limits (around 2000 items) and .1pux can't be split into parts. And CSV can't be used for complete import, it doesn't contain attached files and some fields.

[pamperer562580892423]

Thanks for the tip, but my export is safely below all the mentioned limits (around 2000 items) and .1pux can't be split into parts.

Ah...

And CSV can't be used for complete import, it doesn't contain attached files and some fields.

I understand the point with the fields. But if it was possible to export the .1pux again without attachments, that probably would reduce the file size. Yeah, I hear you protest, but Bitwarden can't import file attachments anyway, as far as I know - and this notice says:

(--> https://bitwarden.com/help/import-data/#import-to-your-individual-vault)

[cbbit]

Hi there,

The error you’re encountering is likely due to the size of the file you’re trying to upload. Because the file cannot be split into smaller parts, the best approach is to format it as a .csv or .json file before uploading. For guidance on preparing your file, please see: https://bitwarden.com/help/condition-bitwarden-import/

We use GitHub issues as a place to track bugs and other development related issues. If your issue persists, please write us back using our “Contact support” form located on our Help Center (https://bitwarden.com/help/).

You can include a link to this issue in the message content.

Alternatively, you can also search for an answer in our help documentation or get help from other Bitwarden users on our community forums (https://community.bitwarden.com/c/support/).

The issue here will be closed.

Thanks!