assets-upload-session endpoint returning 500 during static asset upload #11153
Description
What versions & operating system are you using?
Please note that this also occurs from the Cloudflare Builds environment.
System:
OS: macOS 26.0.1
CPU: (12) arm64 Apple M2 Max
Memory: 228.92 MB / 64.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 22.8.0 - /Users/isaac/.asdf/installs/nodejs/22.8.0/bin/node
Yarn: 1.22.19 - /Users/isaac/.yarn/bin/yarn
npm: 10.8.2 - /Users/isaac/.asdf/plugins/nodejs/shims/npm
pnpm: 10.4.0 - /Users/isaac/.asdf/installs/nodejs/22.8.0/bin/pnpm
bun: 1.2.2 - /Users/isaac/.asdf/shims/bun
Watchman: 2025.09.15.00 - /opt/homebrew/bin/watchman
npmPackages:
@cloudflare/vitest-pool-workers: ^0.9.9 => 0.9.9
@cloudflare/workers-types: ^4.20251001.0 => 4.20251014.0
wrangler: ^4.45.3 => 4.45.3
Please provide a link to a minimal reproduction
I cannot reproduce this outside of this specific project. I'd be glad to provide my account ID / worker name upon request, since this feels like maybe some bad state on the Cloudflare side?
Describe the Bug
When deploying, if my worker is configured with a static asset binding, the assets-upload-session endpoint returns a 500, causing an error 10013 to fail the deploy.
Please provide any relevant error logs
🌀 Building list of assets...
✨ Read 1 file from the assets directory /Users/isaac/Developer/<redacted>/public
/terms.html
🌀 Starting asset upload...
-- START CF API REQUEST: POST https://api.cloudflare.com/client/v4/accounts/<redacted>/workers/scripts/<redacted>/assets-upload-session
QUERY STRING:
HEADERS: {
"content-type": "application/json",
"user-agent": "wrangler/4.45.3"
}
INIT: {
"headers": {
"Content-Type": "application/json"
},
"method": "POST",
"body": "{\"manifest\":{\"/terms.html\":{\"hash\":\"f8064655fd552f5669b59372ad095ff1\",\"size\":10044}}}"
}
-- END CF API REQUEST
-- START CF API RESPONSE: Internal Server Error 500
HEADERS: {
"api-version": "2025-11-01",
"cf-auditlog-id": "019a4153-9f0c-7ddd-87c8-ee2da1f1786c",
"cf-cache-status": "DYNAMIC",
"cf-ray": "997e7d6b2c3f6b15-DFW",
"connection": "keep-alive",
"content-encoding": "gzip",
"content-type": "application/json; charset=UTF-8",
"date": "Sat, 01 Nov 2025 21:29:51 GMT",
"ratelimit": "\"default\";r=1199;t=1",
"ratelimit-policy": "\"default\";q=1200;w=300",
"server": "cloudflare",
"set-cookie": "_cfuvid=iSSBvbzZU0oLv4RcfyjXt_XKCRnJ4GZI6keMGftEGo0-1762032591285-0.0.1.1-604800000; path=/; domain=.api.cloudflare.com; HttpOnly; Secure; SameSite=None",
"transfer-encoding": "chunked",
"vary": "Accept-Encoding"
}
RESPONSE: {
"result": null,
"success": false,
"errors": [
{
"code": 10013,
"message": "An unknown error has occurred. If this error persists, please file a report in workers-sdk (https://github.com/cloudflare/workers-sdk/issues) or reach out to your account team."
}
],
"messages": []
}
-- END CF API RESPONSE
Metadata
Metadata
Assignees
Type
Projects
Status