UBUNTU-CVE-2026-115269 (CVE-2026-115269)

Vulnerability from osv_ubuntu – Published: 2026-10-26 14:16 – Updated: 2026-10-28 17:50 – Source website
VLAI
Details

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 request body reader of mtrudel bandit allows an unauthenticated remote attacker to hold stream processes open indefinitely via WINDOW_UPDATE or empty SETTINGS frames sent while a Plug reads the request body. Bandit.HTTP2.Stream.do_read_data/4 in lib/bandit/http2/stream.ex waits for each frame with a fresh read_timeout. A stream WINDOW_UPDATE, or the zero-delta window update that every empty SETTINGS frame delivers to all streams, ends the wait without delivering any body data, and the loop starts a new full countdown. A client that sends one of these 9-byte frames before each countdown expires keeps read_body blocked, together with the stream process and whatever the application holds while reading, for as long as it likes. This issue affects bandit: from 1.4.0 before 1.14.0.

Severity
8.7 (High)
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
8.7 (High)
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
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "0.13.2-3"
          },
          {
            "binary_name": "python-bandit",
            "binary_version": "0.13.2-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "0.13.2-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@0.13.2-3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13.2-1",
        "0.13.2-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.4.0-0ubuntu2"
          },
          {
            "binary_name": "python-bandit",
            "binary_version": "1.4.0-0ubuntu2"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.4.0-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.4.0-0ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.1-3",
        "1.6.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.2-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.9.4-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.9.4-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.9.4-1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.7.10-3",
        "1.9.4-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.7.10-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.7.10-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.7.10-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.7.10-2",
        "1.7.10-3"
      ]
    }
  ],
  "aliases": [],
  "details": "Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 request body reader of mtrudel bandit allows an unauthenticated remote attacker to hold stream processes open indefinitely via WINDOW_UPDATE or empty SETTINGS frames sent while a Plug reads the request body. Bandit.HTTP2.Stream.do_read_data/4 in lib/bandit/http2/stream.ex waits for each frame with a fresh read_timeout. A stream WINDOW_UPDATE, or the zero-delta window update that every empty SETTINGS frame delivers to all streams, ends the wait without delivering any body data, and the loop starts a new full countdown. A client that sends one of these 9-byte frames before each countdown expires keeps read_body blocked, together with the stream process and whatever the application holds while reading, for as long as it likes. This issue affects bandit: from 1.4.0 before 1.14.0.",
  "id": "UBUNTU-CVE-2026-115269",
  "modified": "2026-10-28T17:50:37Z",
  "published": "2026-10-26T14:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://cna.erlef.org/cves/cve-2026-115269.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/security/advisories/ghsa-p2qv-vx88-385x"
    },
    {
      "type": "REPORT",
      "url": "https://hex.pm/packages/bandit"
    },
    {
      "type": "REPORT",
      "url": "https://github.com"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit"
    },
    {
      "type": "REPORT",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cveproject/cvelistv5/tree/main/cves/2026/115xxx/cve-2026-115269.json"
    },
    {
      "type": "REPORT",
      "url": "https://nvd.nist.gov/vuln/detail/cve-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://osv.dev/vulnerability/eef-cve-2026-115269"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "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: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": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-115269"
  ]
}



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