CVEvulnerability

CVE-2026-115269

8.7 HIGH Published 2026-10-26 Modified 2026-10-26 Official page ↗
Status
Awaiting Analysis
Published
2026-10-26
Last modified
2026-10-26
Assigner
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
CVSS 4.0 (6b3ad84c-e1a6-4bf7-a703-f496b71e49db)
8.7 HIGH — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-770, CWE-835

Description

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 request body reader of mtrudel bandit allows an unauthenticated remote attacker to hold stream processes open indefinitely via WINDOW_UPDATE or empty SETTINGS frames sent while a Plug reads the request body. Bandit.HTTP2.Stream.do_read_data/4 in lib/bandit/http2/stream.ex waits for each frame with a fresh read_timeout. A stream WINDOW_UPDATE, or the zero-delta window update that every empty SETTINGS frame delivers to all streams, ends the wait without delivering any body data, and the loop starts a new full countdown. A client that sends one of these 9-byte frames before each countdown expires keeps read_body blocked, together with the stream process and whatever the application holds while reading, for as long as it likes. This issue affects bandit: from 1.4.0 before 1.14.0.

Related

Weakness · CWE (2)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness
  • CWE-835 Loop with Unreachable Exit Condition weakness

References