CVE-2026-115269

Published: Ott 26, 2026 Last Modified: Ott 26, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,7
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

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.

770

Allocation of Resources Without Limits or Throttling

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
835

Loop with Unreachable Exit Condition ('Infinite Loop')

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Amplification
Applicable Platforms
All platforms may be affected
View CWE Details
https://cna.erlef.org/cves/CVE-2026-115269.html
https://cna.erlef.org/cves/CVE-2026-115269.html
https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305…
https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e…
https://github.com/mtrudel/bandit/commit/fff06efe3be962b484…
https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a23…
https://github.com/mtrudel/bandit/security/advisories/GHSA-…
https://github.com/mtrudel/bandit/security/advisories/GHSA-p2qv-vx88-385x
https://osv.dev/vulnerability/EEF-CVE-2026-115269
https://osv.dev/vulnerability/EEF-CVE-2026-115269