usn-8198-2
Vulnerability from osv_ubuntu
Published
2026-04-28 19:27
Modified
2026-05-20 14:48
Summary
python-tornado vulnerabilities
Details

USN-8198-1 fixed vulnerabilities in Tornado. This update provides the corresponding updates for Ubuntu 26.04 LTS.

Original advisory details:

It was discovered that Tornado incorrectly handled parsing of large multipart request bodies. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-31958)

It was discovered that Tornado did not properly validate characters in cookie values. An attacker could possibly use this issue to inject arbitrary cookie attributes. (CVE-2026-35536)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-31958",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35536",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-tornado",
            "binary_version": "6.5.4-0.1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "python-tornado",
        "purl": "pkg:deb/ubuntu/python-tornado@6.5.4-0.1ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.5.4-0.1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.4.2-3",
        "6.5.2-3",
        "6.5.4-0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-8198-1 fixed vulnerabilities in Tornado. This update provides the\ncorresponding updates for Ubuntu 26.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that Tornado incorrectly handled parsing of large\n multipart request bodies. An attacker could possibly use this issue to\n cause a denial of service. (CVE-2026-31958)\n\n It was discovered that Tornado did not properly validate characters in\n cookie values. An attacker could possibly use this issue to inject\n arbitrary cookie attributes. (CVE-2026-35536)",
  "id": "USN-8198-2",
  "modified": "2026-05-20T14:48:19Z",
  "published": "2026-04-28T19:27:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8198-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-31958"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35536"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python-tornado vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-31958",
    "UBUNTU-CVE-2026-35536"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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