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  1. Web
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  5. 423 Locked
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423 Locked

The HTTP 423 Locked client error response status code indicates that a resource is locked, meaning it can't be accessed. Its response body should contain information in WebDAV's XML format.

Note: The ability to lock a resource to prevent conflicts is specific to some WebDAV servers. Browsers accessing web pages will never encounter this status code; in the erroneous cases it happens, they will handle it as a generic 400 status code.

In this article

Status

http
423 Locked

Examples

WebDAV 423 Locked response

http
HTTP/1.1 423 Locked
Content-Type: application/xml; charset="utf-8"
Content-Length: xxxx

<?xml version="1.0" encoding="utf-8" ?>
<D:error xmlns:D="DAV:">
  <D:lock-token-submitted>
    <D:href>/workspace/web-dav/</D:href>
  </D:lock-token-submitted>
</D:error>

Specifications

Specification
RFC 4918
# section-11.3

See also

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This page was last modified on Jun 22, 2026 by MDN contributors.

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  1. HTTP
  2. Guides
  3. Overview of HTTP
  4. Evolution of HTTP
  5. A typical HTTP session
  6. HTTP messages
  7. Media types
    1. Common types
  8. Compression in HTTP
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  10. HTTP authentication
  11. Using HTTP cookies
  12. Redirections in HTTP
  13. Conditional requests
  14. Range requests
  15. Client hints
  16. User-Agent reduction
  17. Compression Dictionary Transport
  18. Network Error Logging
  19. Content negotiation
    1. Default Accept values
  20. Browser detection using the UA string
  21. Connection management in HTTP/1.x
  22. Protocol upgrade mechanism
  23. Proxy servers and tunneling
    1. Proxy Auto-Configuration (PAC) file
  24. Security and privacy
    1. HTTP Observatory
    2. Practical implementation guides
    3. Permissions Policy
    4. Cross-Origin Resource Policy (CORP)
    5. IFrame credentialless
    6. Fetch metadata
    7. Cross-Origin Resource Sharing (CORS)
    8. CORS errors
      1. Reason: CORS disabled
      2. Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'
      3. Reason: CORS header 'Access-Control-Allow-Origin' missing
      4. Reason: CORS header 'Origin' cannot be added
      5. Reason: CORS preflight channel did not succeed
      6. Reason: CORS request did not succeed
      7. Reason: CORS request external redirect not allowed
      8. Reason: CORS request not HTTP
      9. Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'
      10. Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'
      11. Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'
      12. Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'
      13. Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'
      14. Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel
      15. Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed
    9. Content Security Policy (CSP)
      1. Errors and warnings
  25. Reference
  26. HTTP headers
    1. Accept
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  28. HTTP response status codes
    1. 100 Continue
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    4. 103 Early Hints
    5. 200 OK
    6. 201 Created
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    41. 421 Misdirected Request
    42. 422 Unprocessable Content
    43. 423 Locked
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    45. 425 Too Early
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    56. 505 HTTP Version Not Supported
    57. 506 Variant Also Negotiates
    58. 507 Insufficient Storage
    59. 508 Loop Detected
    60. 510 Not Extended
    61. 511 Network Authentication Required
  29. CSP directives
    1. base-uri
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    3. child-src
    4. connect-src
    5. default-src
    6. fenced-frame-src
    7. font-src
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    16. report-to
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    19. sandbox
    20. script-src
    21. script-src-attr
    22. script-src-elem
    23. style-src
    24. style-src-attr
    25. style-src-elem
    26. trusted-types
    27. upgrade-insecure-requests
    28. worker-src
  30. Permissions-Policy directives
    1. accelerometer
    2. ambient-light-sensor
    3. aria-notify
    4. attribution-reporting
    5. autoplay
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    9. captured-surface-control
    10. ch-ua-high-entropy-values
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    26. local-fonts
    27. local-network
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    29. loopback-network
    30. magnetometer
    31. microphone
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    34. otp-credentials
    35. payment
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    37. private-state-token-issuance
    38. private-state-token-redemption
    39. publickey-credentials-create
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    41. screen-wake-lock
    42. serial
    43. speaker-selection
    44. storage-access
    45. summarizer
    46. translator
    47. usb
    48. web-share
    49. window-management
    50. xr-spatial-tracking
  31. HTTP resources and specifications
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