Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated memory exhaustion via oversized HTTP/2 frames.
'Elixir.Bandit.HTTP2.Frame':deserialize/2 in lib/bandit/http2/frame.ex checks the SETTINGS_MAX_FRAME_SIZE limit only after pattern-matching payload::binary-size(length), which requires the entire frame body to be present in memory before either the accept or reject clause can fire. A peer that announces a frame length up to the 24-bit maximum (~16 MiB) causes the server to buffer that entire body before the size guard is evaluated, regardless of the max_frame_size negotiated during the HTTP/2 handshake (default 16 KiB per RFC 9113).
An unauthenticated attacker holding many concurrent connections can force the server to buffer far more memory than the negotiated frame size limit should permit, leading to memory pressure and potential denial of service.
This issue affects bandit: from 0.3.6 before 1.11.0.
CVSS
No CVSS.
References
Configurations
No configuration.
History
02 May 2026, 02:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/mtrudel/bandit/security/advisories/GHSA-q6v9-r226-v65f - |
01 May 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-01 21:16
Updated : 2026-05-05 19:37
NVD link : CVE-2026-42788
Mitre link : CVE-2026-42788
CVE.ORG link : CVE-2026-42788
JSON object : View
Products Affected
No product.
CWE
CWE-770
Allocation of Resources Without Limits or Throttling