fix(deps): update dependency werkzeug to v3.1.6 [security]#87
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This PR contains the following updates:
==3.1.3→==3.1.6Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
Werkzeug safe_join() allows Windows special device names
CVE-2025-66221 / GHSA-hgf8-39gv-g3f2
More information
Details
Werkzeug's
safe_joinfunction allows path segments with Windows device names. On Windows, there are special device names such asCON,AUX, etc that are implicitly present and readable in every directory.send_from_directoryusessafe_jointo safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Werkzeug safe_join() allows Windows special device names with compound extensions
CVE-2026-21860 / GHSA-87hc-h4r5-73f7
More information
Details
Werkzeug's
safe_joinfunction allows path segments with Windows device names that have file extensions or trailing spaces. On Windows, there are special device names such asCON,AUX, etc that are implicitly present and readable in every directory. Windows still accepts them with any file extension, such asCON.txt, or trailing spaces such asCON.This was previously reported as GHSA-hgf8-39gv-g3f2, but the fix failed to account for compound extensions such as
CON.txt.htmlor trailing spaces. It also missed some additional special names.send_from_directoryusessafe_jointo safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Werkzeug safe_join() allows Windows special device names
CVE-2025-66221 / GHSA-hgf8-39gv-g3f2
More information
Details
Werkzeug's
safe_joinfunction allows path segments with Windows device names. On Windows, there are special device names such asCON,AUX, etc that are implicitly present and readable in every directory.send_from_directoryusessafe_jointo safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Werkzeug safe_join() allows Windows special device names with compound extensions
CVE-2026-21860 / GHSA-87hc-h4r5-73f7
More information
Details
Werkzeug's
safe_joinfunction allows path segments with Windows device names that have file extensions or trailing spaces. On Windows, there are special device names such asCON,AUX, etc that are implicitly present and readable in every directory. Windows still accepts them with any file extension, such asCON.txt, or trailing spaces such asCON.This was previously reported as GHSA-hgf8-39gv-g3f2, but the fix failed to account for compound extensions such as
CON.txt.htmlor trailing spaces. It also missed some additional special names.send_from_directoryusessafe_jointo safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Werkzeug safe_join() allows Windows special device names
CVE-2026-27199 / GHSA-29vq-49wr-vm6x
More information
Details
Werkzeug's
safe_joinfunction allows Windows device names as filenames if when preceded by other path segments.This was previously reported as GHSA-hgf8-39gv-g3f2, but the added filtering failed to account for the fact that
safe_joinaccepts paths with multiple segments, such asexample/NUL.send_from_directoryusessafe_jointo safely serve files at user-specified paths under a directory. If the application is running on Windows, and the requested path ends with a special device name, the file will be opened successfully, but reading will hang indefinitely.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Release Notes
pallets/werkzeug (werkzeug)
v3.1.6Compare Source
Released 2026-02-19
safe_joinon Windows does not allow special devices names inmulti-segment paths. :ghsa:
29vq-49wr-vm6xv3.1.5Compare Source
Released 2026-01-08
safe_joinon Windows does not allow more special device names, regardlessof extension or surrounding spaces. :ghsa:
87hc-h4r5-73f7\r\nsequence at a chunk boundary.This fixes the previous attempt, which caused incorrect content lengths.
:issue:
3065:issue:3077AttributeErrorwhen initializingDebuggedApplicationwithpin_security=False. :issue:3075v3.1.4Compare Source
Released 2025-11-28
safe_joinon Windows does not allow special device names. This preventsreading from these when using
send_from_directory.secure_filenamealready prevented writing to these. :ghsa:
hgf8-39gv-g3f23020\r\nsequence at a chunk boundary.:issue:
30653054Request.jsonannotation is more accurate. :issue:3067source lines. :issue:
3044HTTPException.get_responseannotation and doc better conveys thedistinction between WSGI and sans-IO responses. :issue:
3056Configuration
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