golang-github-go-viper-mapstructure — security advisory

{
  "id": "25a4db4b45789a604d0da5875e421d6e57fe4a58e6b1dae27c58b25185018c39",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-11065",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2025-11065",
    "summary": "A flaw was found in github.com/go-viper/mapstructure/v2, in the field processing component using mapstructure.WeakDecode. This vulnerability allows information disclosure through detailed error messages that may leak sensitive input values via malformed user-supplied data processed in security-critical contexts.",
    "evidence": "osv:UBUNTU-CVE-2025-11065",
    "products": [
      {
        "name": {
          "value": "golang-github-go-viper-mapstructure",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.1-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-github-go-viper-mapstructure",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.4.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.5.0-2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-github-go-viper-mapstructure",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.2.1-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.4.0-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2025-11065",
      "aliases": [
        "UBUNTU-CVE-2025-11065"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-go-viper-mapstructure",
            "purl": "pkg:deb/ubuntu/golang-github-go-viper-mapstructure?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "2.2.1-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11065.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-github-go-viper-mapstructure-dev",
                "binary_version": "2.2.1-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-go-viper-mapstructure",
            "purl": "pkg:deb/ubuntu/golang-github-go-viper-mapstructure?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "2.4.0-1",
            "2.5.0-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11065.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-github-go-viper-mapstructure-dev",
                "binary_version": "2.5.0-2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-go-viper-mapstructure",
            "purl": "pkg:deb/ubuntu/golang-github-go-viper-mapstructure?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "2.2.1-1",
            "2.2.1-2",
            "2.4.0-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11065.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-github-go-viper-mapstructure-dev",
                "binary_version": "2.4.0-1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:56:46.782350722Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-11065"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2025-11065",
        "https://www.cve.org/CVERecord?id=CVE-2025-11065",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2391829",
        "https://github.com/go-viper/mapstructure/security/advisories/GHSA-2464-8j7c-4cjm",
        "https://github.com/go-viper/mapstructure/commit/742921c9ba2854d27baa64272487fc5075d2c39c"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-11065",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 356243,
  "published_at": "2026-01-26T20:16:00+00:00"
}