CVE-2017-0909

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-11-16 · updated 2026-06-17
Weakness: CWE-184

Description

The private_address_check ruby gem before 0.4.1 is vulnerable to a bypass due to an incomplete blacklist of common private/local network addresses used to prevent server-side request forgery.

Affected products

HackerOne private_address_check ruby gem: before 0.4.1 — fixed in 0.4.1

How to fix

Upgrade to a fixed version: HackerOne private_address_check ruby gem 0.4.1. Check the vendor advisory for mitigations.

References

https://github.com/jtdowney/private_address_check/pull/3
https://hackerone.com/reports/288950
https://github.com/jtdowney/private_address_check/pull/3
https://hackerone.com/reports/288950

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