https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-08T03:25:59.728729+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-42175 CVE-2026-42175 — requests-hardened: Server-Side Request Forgery (SSRF) in requests-hardened RFC 6598 2026-10-08T03:25:59.730850+00:00

Affected: saleor requests-hardened

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 .

 https://vulnerability.circl.lu/vuln/ghsa-vh75-fwv3-pqrh GHSA-vh75-fwv3-pqrh — requests-hardened is Vulnerable to Server-Side Request Forgery 2026-10-08T03:25:59.730928+00:00

Affected: PyPI: requests-hardened

The SSRF protection in `requests-hardened` prior to version 1.2.1 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.

The issue is resolved in version 1.2.1 by extending the IP filtering logic to explicitly block the RFC 6598 range in addition to standard private addresses, as well as blocking all other reserved addresses (such as multicast) to prevent the re-occurrence of similar issues.

Version 1.2.1 is now blocking the following CIDRs:

- `192.88.99.0/24` - 6to4 relay anycast - `100.64.0.0/10` - CG-NAT - `5f00::/16` - IPv6 Segment Routing - `64:ff9b::/96` - used for IPv6 & IPv4 translation (NAT64) - `2001:20::/28` - ORCHIDv2 (overlay identifiers) - `224.0.0.0/4` - multicast - `ff00::/8` - multicast

## Resources

- https://github.com/python/cpython/issues/119812 - https://github.com/saleor/requests-hardened/commit/b7403f88d3b3689e57435b75b51691a160aaeef5 - the fix itself - https://github.com/saleor/requests-hardened/commit/a266b3958bb142bca515b3c230fdea19fbda327c - follow up, adding additional supp…