High

HyperLPR Denial of Service vulnerability

  • Disclosed: 20.03.2025
  • Updated: 11.10.2026 13:18

A vulnerability in szad670401/hyperlpr v3.0 allows for a Denial of Service (DoS) attack. The server fails to handle excessive characters appended to the end of multipart boundaries, regardless of the character used. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary, leading to excessive resource consumption and a complete denial of service for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue.

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) hyperlpr3 <= 3.0 no fix

References

CVSS score 7.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-400, CWE-770
Platform
Python (PyPI)
Package
hyperlpr3
Disclosed
20.03.2025
Updated
11.10.2026 13:18

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-1457 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-cg4p-5qfm-pjjj - CC BY 4.0

Vulnerability history: hyperlpr3

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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