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CVE-2026-65623 Quadratic CPU blow-up reassembling fragmented WebSocket messages in Bandit

🗓️ 24 Jul 2026 16:32:24Reported by EEFType 
cvelist
 cvelist
🔗 www.cve.org👁 10 Views

CVE-2026-65623 Bandit WebSocket fragment reassembly causes unauthenticated CPU exhaustion and denial of service.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CVE
CVE-2026-65623
24 Jul 202616:32
cve
EUVD
EUVD-2026-48718
24 Jul 202616:32
euvd
NVD
CVE-2026-65623
24 Jul 202617:17
nvd
Positive Technologies
PT-2026-64373
24 Jul 202600:00
ptsecurity
Vulnrichment
CVE-2026-65623 Quadratic CPU blow-up reassembling fragmented WebSocket messages in Bandit
24 Jul 202616:32
vulnrichment
[
  {
    "collectionURL": "https://repo.hex.pm",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "Elixir.Bandit.WebSocket.Connection"
    ],
    "packageName": "bandit",
    "packageURL": "pkg:hex/bandit",
    "product": "bandit",
    "programFiles": [
      "lib/bandit/websocket/connection.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.Bandit.WebSocket.Connection':handle_frame/3"
      },
      {
        "name": "'Elixir.Bandit.WebSocket.Connection':oversize_message?/2"
      }
    ],
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "1.12.1",
        "status": "affected",
        "version": "1.11.0",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://github.com",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "Elixir.Bandit.WebSocket.Connection"
    ],
    "packageName": "mtrudel/bandit",
    "packageURL": "pkg:github/mtrudel/bandit",
    "product": "bandit",
    "programFiles": [
      "lib/bandit/websocket/connection.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.Bandit.WebSocket.Connection':handle_frame/3"
      },
      {
        "name": "'Elixir.Bandit.WebSocket.Connection':oversize_message?/2"
      }
    ],
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "418ef7e906192a230ddba112f7a669c87b6b0e3a",
        "status": "affected",
        "version": "21612c7c7b1ce43eccd36d3af3a2299d23513667",
        "versionType": "git"
      }
    ]
  }
]

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