Attachments uploading not working v2025.11.1 #6660
Description
Steps To Reproduce
- Open an existing login
- Edit the login and click 'Attachments'
- Select a file and upload it
Expected Result
I expect that the attachment is correctly uploaded
Actual Result
The first attempt will display an error 'An unhandled server error has occurred'. The request is a POST to the endpoint: /api/ciphers/{id}/attachment/{attachmentId} and the response is:
{
"message": "An unhandled server error has occurred.",
"validationErrors": null,
"exceptionMessage": null,
"exceptionStackTrace": null,
"innerExceptionMessage": null,
"object": "error"
}The second try will display an error 'The cipher you are updating is out of date. Please save your work, sync your vault, and try again.'. The request is a POST to the endpoint:
api/ciphers/{id}/attachment/v2 and the response is:
{
"message": "The cipher you are updating is out of date. Please save your work, sync your vault, and try again.",
"validationErrors": null,
"exceptionMessage": null,
"exceptionStackTrace": null,
"innerExceptionMessage": null,
"object": "error"
}If I see the docker logs of bitwarden-api container i'll see:
fail: Bit.Api.Utilities.ExceptionHandlerFilterAttribute[0]
=> SpanId:ec0b30615effca6e, TraceId:7aaac3c96093994bc83a13f2a9a7bbd7, ParentId:0000000000000000 => ConnectionId:0HNHGPH23445N => RequestPath:/ciphers/580517a7-d231-4032-ae21-b36f0081f460/attachment/ppvqj7cjtfeuj1e2dzqsyfnvbguhchlm RequestId:0HNHGPH23445N:00000001 => IpAddress*redacted ip* UserAgent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 DeviceType:9 Origin:9 ClientVersion:2025.11.1 => Bit.Api.Vault.Controllers.CiphersController.PostFileForExistingAttachment (Api)
Unhandled exception
System.IO.IOException: Unexpected end of Stream, the content may have already been read by another component.
at Microsoft.AspNetCore.WebUtilities.MultipartReaderStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
at Microsoft.AspNetCore.WebUtilities.StreamHelperExtensions.DrainAsync(Stream stream, ArrayPool`1 bytePool, Nullable`1 limit, CancellationToken cancellationToken)
at Microsoft.AspNetCore.WebUtilities.MultipartReader.ReadNextSectionAsync(CancellationToken cancellationToken)
at Bit.Api.Utilities.MultipartFormDataHelper.GetFileAsync(HttpRequest request, Func`2 callback) in /source/src/Api/Utilities/MultipartFormDataHelper.cs:line 109
at Bit.Api.Vault.Controllers.CiphersController.PostFileForExistingAttachment(Guid id, String attachmentId) in /source/src/Api/Vault/Controllers/CiphersController.cs:line 1425
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Logged|12_1(ControllerActionInvoker invoker)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
Screenshots or Videos
No response
Additional Context
No response
Build Version
2025.11.1+28469e0
Environment
Self-Hosted
Environment Details
- Operating system: Debian
- Environment: Docker
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.