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CVE-2026-103022 Details

Description

Urwid is a console user interface library for Python. Prior to 4.0.7, handle_short_request() in urwid/display/web.py performs unguarded character encoding on POST input and unguarded UTF-8 decoding on polling update socket output. A remote attacker who obtains a valid X-Urwid-ID session token can submit non-ASCII POST data that raises UnicodeEncodeError, while non-UTF-8 polling output raises UnicodeDecodeError, causing the CGI handler to return an error and terminate request processing. The POST exception path also leaves an opened file descriptor unclosed for the CGI process lifetime, so repeated requests can cause denial of service for the web display interface. This issue is fixed in version 4.0.7.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/urwid/urwid/commit/b79d9a96843a6f5950bb2bfab5d059bdc61c538b	[email protected]
https://github.com/urwid/urwid/pull/1201	[email protected]
https://github.com/urwid/urwid/releases/tag/4.0.7	[email protected]
https://github.com/urwid/urwid/security/advisories/GHSA-cp25-j9x5-p5xm	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-116	Improper Encoding or Escaping of Output	[email protected]
CWE-248	Uncaught Exception	[email protected]
CWE-775	Missing Release of File Descriptor or Handle after Effective Lifetime	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes