requests-hardened: Server-Side Request Forgery (SSRF) in requests-hardened RFC 6598

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-42175",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-05-12T17:52:09.138Z",
    "dateReserved": "2026-04-25T01:53:21.582Z",
    "datePublished": "2026-05-12T17:52:09.138Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M",
        "dateUpdated": "2026-05-12T17:52:09.138Z"
      },
      "title": "requests-hardened: Server-Side Request Forgery (SSRF) in requests-hardened  RFC 6598",
      "descriptions": [
        {
          "lang": "en",
          "value": "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 ."
        }
      ],
      "affected": [
        {
          "vendor": "saleor",
          "product": "requests-hardened",
          "versions": [
            {
              "version": "< 1.2.1",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "cweId": "CWE-918",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/saleor/requests-hardened/security/advisories/GHSA-vh75-fwv3-pqrh",
          "name": "https://github.com/saleor/requests-hardened/security/advisories/GHSA-vh75-fwv3-pqrh",
          "tags": [
            "x_refsource_CONFIRM"
          ]
        },
        {
          "url": "https://github.com/saleor/requests-hardened/commit/a266b3958bb142bca515b3c230fdea19fbda327c",
          "name": "https://github.com/saleor/requests-hardened/commit/a266b3958bb142bca515b3c230fdea19fbda327c",
          "tags": [
            "x_refsource_MISC"
          ]
        },
        {
          "url": "https://github.com/saleor/requests-hardened/commit/b7403f88d3b3689e57435b75b51691a160aaeef5",
          "name": "https://github.com/saleor/requests-hardened/commit/b7403f88d3b3689e57435b75b51691a160aaeef5",
          "tags": [
            "x_refsource_MISC"
          ]
        },
        {
          "url": "https://github.com/saleor/requests-hardened/releases/tag/v1.2.1",
          "name": "https://github.com/saleor/requests-hardened/releases/tag/v1.2.1",
          "tags": [
            "x_refsource_MISC"
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM"
          }
        }
      ]
    }
  }
}