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Unexpected code execution when invoking toolchain in cmd/go

Type: advisorySources: OSV

Downloading and building modules with malicious version strings can cause local code execution. On systems with Mercurial (hg) installed, downloading modules from non-standard sources (e.g., custom domains) can cause unexpected code execution due to how external VCS commands are constructed. This issue can also be triggered by providing a malicious version string to the toolchain. On systems with Git installed, downloading and building modules with malicious version strings can allow an attacker to write to arbitrary files on the filesystem. This can only be triggered by explicitly providing the malicious version strings to the toolchain and does not affect usage of @latest or bare module paths.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2025-68119
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 18:41 UTC · Revision 1

Source evidence

Unexpected code execution when invoking toolchain in cmd/go

core-osv · Original source

Published 28 Jan 2026, 19:30 UTC

Downloading and building modules with malicious version strings can cause local code execution. On systems with Mercurial (hg) installed, downloading modules from non-standard sources (e.g., custom domains) can cause unexpected code execution due to how external VCS commands are constructed. This issue can also be triggered by providing a malicious version string to the toolchain. On systems with Git installed, downloading and building modules with malicious version strings can allow an attacker to write to arbitrary files on the filesystem. This can only be triggered by explicitly providing the malicious version strings to the toolchain and does not affect usage of @latest or bare module paths.

osv:CVE-2025-68119
Complete source record
{
  "id": "72fd15c541481d2affeaf4e17081349e4cc6d0b7a16e5f3dafda328e22edd7be",
  "url": "https://osv.dev/vulnerability/CVE-2025-68119",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Unexpected code execution when invoking toolchain in cmd/go",
    "summary": "Downloading and building modules with malicious version strings can cause local code execution. On systems with Mercurial (hg) installed, downloading modules from non-standard sources (e.g., custom domains) can cause unexpected code execution due to how external VCS commands are constructed. This issue can also be triggered by providing a malicious version string to the toolchain. On systems with Git installed, downloading and building modules with malicious version strings can allow an attacker to write to arbitrary files on the filesystem. This can only be triggered by explicitly providing the malicious version strings to the toolchain and does not affect usage of @latest or bare module paths.",
    "evidence": "osv:CVE-2025-68119",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-68119",
      "aliases": [
        "BIT-golang-2025-68119",
        "CVE-2025-68119",
        "GO-2026-4338"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/golang/go",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "63a1b82d1e68ddd87652467303901593efe0ff11"
                },
                {
                  "introduced": "6e676ab2b809d46623acb5988248d95d1eb7939c"
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                {
                  "fixed": "69801b25b9624c3a678ef87d30771861e7bba51f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.24.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.25.0"
                      },
                      {
                        "fixed": "1.25.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "go1.24.11",
            "go1.25.5",
            "go1.24.10",
            "go1.25.4",
            "go1.24.9",
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            "go1.24.5",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68119.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.238772394Z",
      "provider": "osv",
      "references": [
        "https://go.dev/cl/736710",
        "https://go.dev/issue/77099",
        "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc",
        "https://pkg.go.dev",
        "https://pkg.go.dev/vuln/GO-2026-4338",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68119.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68119"
      ],
      "provider_metadata": {
        "cna_assigner": "Go",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.25.0"
                  },
                  {
                    "fixed": "1.25.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68119.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68119",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505790,
  "published_at": "2026-01-28T19:30:30.704+00:00"
}