CVE-2026-111101

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Source
https://cve.org/CVERecord?id=CVE-2026-111101
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111101.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-111101
Aliases
Downstream
Published
2026-10-26T13:31:48Z
Modified
2026-10-28T02:56:07Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
HTTP/1.1 chunked request bodies made of 1-byte chunks amplify memory use in Bandit
Details

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/1.1 chunked body reader of mtrudel bandit allows an unauthenticated remote attacker to exhaust server memory and CPU via a request body made of many 1-byte chunks.

The chunked reader in lib/bandit/http1/socket.ex keeps every chunk as its own list cell and binary term until IO.iodata_to_binary/1 joins them, and nothing limits the number of chunks. The :length option of read_body/2 counts only data bytes, so tiny chunks cost far more memory than their payload: 48 MB of 1-byte chunks grew one handler process to about 500 MB and took about 6 s of CPU. The route does not need to read the body, because on keep-alive connections ensure_completed/1 drains unread bodies through the same reader.

This issue affects bandit: from 0.1.0 before 1.14.0.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111101.json"
}
References

Affected packages

Git / github.com/mtrudel/bandit

Affected ranges

Type
GIT
Repo
https://github.com/mtrudel/bandit
Events
Introduced
7201270c34b90f6c9e15c0386c2bb802c0c72ab4
Fixed
220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Introduced
4c80fc838640c4dae4743a61494981c57d6eef00
Fixed
220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Fixed
7201270c34b90f6c9e15c0386c2bb802c0c72ab4
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "7201270c34b90f6c9e15c0386c2bb802c0c72ab4"
                },
                {
                    "fixed": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "0.1.0"
                },
                {
                    "fixed": "1.14.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "7201270c34b90f6c9e15c0386c2bb802c0c72ab4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

0.*
0.1.0
0.1.1
0.2.0
0.2.1
0.2.2
0.2.3
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.0
0.4.1
0.4.10
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8
0.4.9
0.5.0
0.5.1
0.5.10
0.5.11
0.5.2
0.5.3
0.5.4
0.5.5
0.5.6
0.5.7
0.5.8
0.5.9
0.6.0
0.6.1
0.6.10
0.6.11
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
0.7.0
0.7.1
0.7.2
0.7.3
0.7.4
0.7.5
0.7.6
0.7.7
1.*
1.0.0
1.0.0-pre.1
1.0.0-pre.10
1.0.0-pre.11
1.0.0-pre.12
1.0.0-pre.13
1.0.0-pre.14
1.0.0-pre.15
1.0.0-pre.16
1.0.0-pre.17
1.0.0-pre.18
1.0.0-pre.2
1.0.0-pre.3
1.0.0-pre.4
1.0.0-pre.5
1.0.0-pre.6
1.0.0-pre.7
1.0.0-pre.8
1.0.0-pre.9
1.1.0
1.1.1
1.1.2
1.1.3
1.10.0
1.10.1
1.10.2
1.10.3
1.10.4
1.11.0
1.11.1
1.12.0
1.12.1
1.12.3
1.12.4
1.12.5
1.13.0
1.13.1
1.2.0
1.2.3
1.3.0
1.4.0
1.4.1
1.4.2
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.5.7
1.6.0
1.6.1
1.6.10
1.6.11
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.6.8
1.6.9
1.7.0
1.8.0
1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111101.json"