CVE-2026-47077

216.73.217.172

· Published 25/05/2026 15:16 · Modified 26/05/2026 19:58

Labels: CVE-2026-47077 2026-05-25 6b3ad84c-e1a6-4bf7-a703-f496b71e49db CVE-2026-47077 CWE-400

Essential information

Published: 25/05/2026 15:16
Modified: 26/05/2026 19:58
Author: —
Creator: —
CVSS: 8.2 HIGH (v3) 8.2 HIGH (v4.0)
CISA KEV: No
CWE: —
CVSS vector: —

CVSS metrics

Description

Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. hackney_h3:await_response_loop/6 accumulates the HTTP/3 response body in memory without any size cap. The after Timeout clause is a per-message inactivity timer that resets on every received chunk, housekeeping message, or settings frame — it is not a wall-clock deadline. A malicious HTTP/3 server that emits one small chunk every Timeout - 1 ms with Fin = false and never sends a final frame keeps the loop alive indefinitely while the accumulation buffer grows linearly without bound, eventually exhausting the BEAM process heap and causing an out-of-memory condition. This issue affects hackney: from 2.0.0 before 4.0.1.

NVD status

Status: Undergoing Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
NVD: View on NVD

Affected products (CPE)

Product	CPE
benoitc / hackney	`cpe:2.3:a:benoitc:hackney:2.0.0:::::::*`
benoitc / hackney	`cpe:2.3:a:benoitc:hackney:<4.0.1:::::::*`