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CVE-2026-42175

CVE-2026-42175 · requests-hardened: Server-Side Request Forgery (SSRF) in requests-hardened RFC 6598

This page contains facts from public vulnerability sources. Check the original advisory before updating.

requests-hardened is a library that overrides the default behaviors of the requests library, and adds new security features. Prior to , the SSRF protection in requests-hardened fails to block IP addresses within the RFC 6598 Shared Address Space (100.64.0.0/10). An attacker who can supply arbitrary URLs to requests-hardened could exploit this gap to access internal services hosted within 100.64.0.0/10. This is for example relevant in environments such as AWS EKS where 100.64.0.0/10 is commonly used as the default pod CIDR. The impact is environment-dependent, deployments that utilize the affected CIDR range for internal networking are exposed to SSRF bypass, while others may not be affected. This vulnerability is fixed in .

CVSS 6.5 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • requests-hardened

    Versions
    • < 1.2.1: Affected

    No fix published

  • requests-hardened PyPI

    Versions
    • 1.0.0
    • 1.0.0b0
    • 1.0.0b1
    • 1.0.0b2
    • 1.0.0b3
    • 1.0.0b4
    • 1.0.0b5
    • 1.1.0
    • 1.1.1
    • 1.2.0
    Affected ranges
    • ECOSYSTEM: < 1.2.1

    Update to 1.2.1

Original sources

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