CVE-2026-42507 (GCVE-0-2026-42507)
Vulnerability from cvelistv5
Published
2026-06-02 22:01
Modified
2026-06-03 19:04
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
Summary
When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.
References
Impacted products
Vendor Product Version
Go standard library net/textproto Version: 0   ≤
Version: 1.26.0-0   ≤
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42507",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T19:04:08.223332Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T19:04:45.361Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/textproto",
          "product": "net/textproto",
          "programRoutines": [
            {
              "name": "parseCodeLine"
            },
            {
              "name": "Reader.ReadCodeLine"
            },
            {
              "name": "readMIMEHeader"
            },
            {
              "name": "Error.Error"
            },
            {
              "name": "Reader.ReadMIMEHeader"
            },
            {
              "name": "Reader.ReadResponse"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.4",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-532: Insertion of Sensitive Information into Log File",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-02T22:01:37.307Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79346"
        },
        {
          "url": "https://go.dev/cl/777060"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5039"
        }
      ],
      "title": "Arbitrary inputs are included in errors without any escaping in net/textproto"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-42507",
    "datePublished": "2026-06-02T22:01:37.307Z",
    "dateReserved": "2026-04-28T00:21:12.792Z",
    "dateUpdated": "2026-06-03T19:04:45.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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