CVE-2026-114213

Allocation of Resources Without Limits or Throttling vulnerability in the WebSocket fragment reassembly of mtrudel bandit allows an unauthenticated remote attacker to exhaust server memory via a fragmented message made of many 1-byte continuation frames. Bandit.WebSocket.Connection checks max_fragmented_message_size against the payload bytes received, but keeps every non-final continuation frame as a new list cell around its own binary, and nothing limits the number of fragments. A 1-byte fragment costs 7 bytes on the wire but about 150 to 170 bytes of server memory, so one connection can hold about 150 times the configured limit, roughly 1.2 to 1.4 GB at the default 8 MB. Ping frames between fragments keep the connection alive past the idle timeout. This issue affects bandit: from 1.11.0 before 1.14.0.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-114213.html
https://github.com/mtrudel/bandit/commit/21612c7c7b1ce43eccd36d3af3a2299d23513667
https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a
https://github.com/mtrudel/bandit/security/advisories/GHSA-cpx7-qf6w-jc63
https://osv.dev/vulnerability/EEF-CVE-2026-114213

Configurations

No configuration.

History

26 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-26 14:16

Updated : 2026-10-26 16:59

NVD link : CVE-2026-114213

Mitre link : CVE-2026-114213

CVE.ORG link : CVE-2026-114213

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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