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CVE-2026-109584 HTTP/2 cookie crumb join expands a small HPACK header block into an unbounded allocation in Bandit

🗓️ 26 Oct 2026 13:32:22Reported by EEFType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

Unauthenticated remote DoS in bandit HTTP/2 via HPACK header block memory exhaustion.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.hex.pm",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "packageName": "bandit",
    "packageURL": "pkg:hex/bandit",
    "product": "bandit",
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "1.14.0",
        "status": "affected",
        "version": "0.3.3",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://github.com",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "packageName": "mtrudel/bandit",
    "packageURL": "pkg:github/mtrudel/bandit",
    "product": "bandit",
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a",
        "status": "affected",
        "version": "44bf969cd59851622fb6ee4d16227fbc39a77fb4",
        "versionType": "git"
      }
    ]
  }
]

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