Search criteria

1 vulnerability by golang.org/x/tools

CVE-2026-42503 (GCVE-0-2026-42503)

Vulnerability from cvelistv5 – Published: 2026-05-06 16:20 – Updated: 2026-05-07 03:55
VLAI?
Title
Accidental binding to INADDR_ANY might lead to RCE in golang.org/x/tools/gopls
Summary
gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging. If -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0.  As a result, users might inadvertently cause gopls to bind 0.0.0.0. This can allow a malicious party on the same network to execute code arbitrarily via gopls.
Severity ?
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-1327 - Binding to an unrestricted IP address
Assigner
Go
References
Impacted products
Vendor Product Version
golang.org/x/tools golang.org/x/tools/gopls Affected: 0.0.0 , < 0.22.0 (semver)
Create a notification for this product.
Date Public ?
2026-05-06 15:19
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42503",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-07T03:55:49.730Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/tools/gopls",
          "product": "golang.org/x/tools/gopls",
          "vendor": "golang.org/x/tools",
          "versions": [
            {
              "lessThan": "0.22.0",
              "status": "affected",
              "version": "0.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-05-06T15:19:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging.\u003cbr\u003eIf -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0.\u0026nbsp;\u003cbr\u003eAs a result, users might\u0026nbsp;inadvertently cause gopls to bind 0.0.0.0.\u003cbr\u003eThis can allow a\u0026nbsp;malicious party on the same network to execute code arbitrarily via gopls."
            }
          ],
          "value": "gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging.\nIf -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0.\u00a0\nAs a result, users might\u00a0inadvertently cause gopls to bind 0.0.0.0.\nThis can allow a\u00a0malicious party on the same network to execute code arbitrarily via gopls."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1327",
              "description": "CWE-1327 Binding to an unrestricted IP address",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T16:20:01.428Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79211"
        },
        {
          "url": "https://go.dev/cl/774381"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Accidental binding to INADDR_ANY might lead to RCE in golang.org/x/tools/gopls",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-42503",
    "datePublished": "2026-05-06T16:20:01.428Z",
    "dateReserved": "2026-04-28T00:21:12.792Z",
    "dateUpdated": "2026-05-07T03:55:49.730Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}