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 .
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Wed, 13 May 2026 16:15:00 +0000
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Wed, 13 May 2026 11:00:00 +0000
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Tue, 12 May 2026 18:15:00 +0000
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| Description | 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 . | |
| Title | requests-hardened: Server-Side Request Forgery (SSRF) in requests-hardened RFC 6598 | |
| Weaknesses | CWE-918 | |
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-12T17:52:09.138Z
Updated: 2026-05-13T15:37:51.415Z
Reserved: 2026-04-25T01:53:21.582Z
Link: CVE-2026-42175
Updated: 2026-05-13T14:56:00.467Z
Status : Received
Published: 2026-05-12T18:17:24.073
Modified: 2026-05-12T18:17:24.073
Link: CVE-2026-42175
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