CVE-2025-22870 (GCVE-0-2025-22870)
Vulnerability from cvelistv5
Published
2025-03-12 18:27
Modified
2026-04-16 22:39
Severity ?
4.4 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
CWE
Summary
Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be proxied.
References
Impacted products
Vendor Product Version
Go standard library net/http Version: 0   ≤
Version: 1.24.0-0   ≤
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        "providerMetadata": {
          "dateUpdated": "2025-05-09T20:03:37.043Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "http://www.openwall.com/lists/oss-security/2025/03/07/2"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20250509-0007/"
          }
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        "title": "CVE Program Container"
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              "attackComplexity": "LOW",
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              "availabilityImpact": "LOW",
              "baseScore": 4.4,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
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              "content": {
                "id": "CVE-2025-22870",
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                "role": "CISA Coordinator",
                "timestamp": "2025-03-18T16:31:16.493335Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
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          "programRoutines": [
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            {
              "name": "PerHost.AddFromString"
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            {
              "name": "Dial"
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              "name": "FromEnvironment"
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      "credits": [
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          "value": "Juho Fors\u00e9n of Mattermost"
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          "value": "Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to \"*.example.com\", a request to \"[::1%25.example.com]:80` will incorrectly match and not be proxied."
        }
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        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
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          "url": "https://go.dev/cl/654697"
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        {
          "url": "https://go.dev/issue/71984"
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        {
          "url": "https://groups.google.com/g/golang-announce/c/4t3lzH3I0eI/m/b42ImqrBAQAJ"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-3503"
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      "title": "HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net"
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    "dateReserved": "2025-01-08T19:11:42.834Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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