Potential share collision for recipients when caching is enabled

Description

Impact

When a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to … (2)

Patches

It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9.
It is recommended that the Nextcloud Enterprise Server is upgraded to 25.0.3 or 24.0.9.

Workarounds

Avoid sharing 2 folders with the same name to the same user.

References

• HackerOne
• PullRequest
• Public ticket

For more information

If you have any questions or comments about this advisory:

• Create a post in nextcloud/security-advisories
• Customers: Open a support ticket at support.nextcloud.com