Vulnerability-Lookup

GHSA-5W89-2C2X-6X66

Vulnerability from github – Published: 2026-04-08 03:32 – Updated: 2026-04-08 03:32

Details

SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-27140"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-08T02:16:02Z",
    "severity": null
  },
  "details": "SWIG file names containing \u0027cgo\u0027 and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.",
  "id": "GHSA-5w89-2c2x-6x66",
  "modified": "2026-04-08T03:32:14Z",
  "published": "2026-04-08T03:32:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27140"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/763768"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/78335"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2026-4871"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-27140 (GCVE-0-2026-27140)

Vulnerability from cvelistv5 – Published: 2026-04-08 01:06 – Updated: 2026-04-09 03:55

Title

Code execution vulnerability in SWIG code generation in cmd/go

Summary

SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.

Severity ?

No CVSS data available.

CWE

CWE-501 - Trust Boundary Violation

Assigner

References

URL

Tags

	https://go.dev/cl/763768
	https://go.dev/issue/78335
	https://groups.google.com/g/golang-announce/c/0uY…
	https://pkg.go.dev/vuln/GO-2026-4871

Impacted products

	Vendor	Product	Version
	Go toolchain	cmd/go	Affected: 0 , < 1.25.9 (semver) Affected: 1.26.0-0 , < 1.26.2 (semver)

Credits

Juho Forsén of Mattermost

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27140",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-09T03:55:58.107Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "cmd/go",
          "product": "cmd/go",
          "vendor": "Go toolchain",
          "versions": [
            {
              "lessThan": "1.25.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.2",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Juho Fors\u00e9n of Mattermost"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SWIG file names containing \u0027cgo\u0027 and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-501: Trust Boundary Violation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-08T01:06:57.893Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/763768"
        },
        {
          "url": "https://go.dev/issue/78335"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4871"
        }
      ],
      "title": "Code execution vulnerability in SWIG code generation in cmd/go"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-27140",
    "datePublished": "2026-04-08T01:06:57.893Z",
    "dateReserved": "2026-02-17T19:57:28.435Z",
    "dateUpdated": "2026-04-09T03:55:58.107Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-5W89-2C2X-6X66

CVE-2026-27140 (GCVE-0-2026-27140)

Tags

Sightings

Nomenclature