CVE-2026-103022

Full vulnerability record from the local CVENow database.

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.

Severity

MEDIUM

CVSS score

5.3 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-06 22:17:49.920000

Last modified

2026-11-06 22:17:49.920000

View original CVE JSON

{
  "id": "CVE-2026-103022",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-06T22:17:49.920",
  "lastModified": "2026-11-06T22:17:49.920",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "urwid",
          "product": "urwid",
          "versions": [
            {
              "version": "< 4.0.7",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-116"
        },
        {
          "lang": "en",
          "value": "CWE-248"
        },
        {
          "lang": "en",
          "value": "CWE-775"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/urwid/urwid/commit/b79d9a96843a6f5950bb2bfab5d059bdc61c538b",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/urwid/urwid/pull/1201",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/urwid/urwid/releases/tag/4.0.7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/urwid/urwid/security/advisories/GHSA-cp25-j9x5-p5xm",
      "source": "[email protected]"
    }
  ]
}