Nginx UI: Self-upgrade runs an unsigned binary verified only by a same-origin digest → RCE via a compromised mirror or MITM

{
  "id": "1639195ae4f4d981b6124b32ad38622d9725632e27d9fe8e95bd4c9a5deb2f69",
  "url": "https://osv.dev/vulnerability/GHSA-662p-52hx-cmh2",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nginx UI: Self-upgrade runs an unsigned binary verified only by a same-origin digest → RCE via a compromised mirror or MITM",
    "summary": "## Summary The self-upgrade downloads the release binary and its checksum (`*.tar.gz` and `*.tar.gz.digest`) through the SAME endpoint (`version.GetUrl()`, which is `github_proxy` or, by default, the project's `cloud.nginxui.com` mirror), and verifies the binary ONLY by comparing it to that digest: `digestFileContent == DigestSHA512(tarName)`. Both the binary and the digest come from the same origin, and there is NO cryptographic signature / public-key verification. The downloaded binary then replaces the running executable (`selfupdate.CommitBinary`) and the process restarts, so the binary runs as the nginx-ui user (typically root). Because integrity rests only on a digest fetched from the same place as the binary, anyone who controls that download path can substitute a malicious binary plus a matching digest and obtain code execution as root on the next upgrade. Additionally, the `github_proxy` setting accepts `http://` URLs, so the binary+digest can be fetched over cleartext. ## Affected code - `internal/version/url.go GetUrl(path)` = `/` — used for BOTH the binary and the digest. - `internal/upgrader/upgrade.go DownloadLatestRelease`: digest URL and binary URL are both wrapped with `GetUrl()`, fetched, and checked with `digestFileContent == DigestSHA512(tarName)`. No signature verification anywhere in `internal/upgrader/`. - `selfupdate.CommitBinary` then replaces the running binary; the process restarts. - `settings/http.go`: `GithubProxy` accepts any URL (`binding:\"omit",
    "evidence": "osv:GHSA-662p-52hx-cmh2",
    "products": [
      {
        "name": {
          "value": "github.com/0xJacky/Nginx-UI",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.9.10-0.20260728114330-580585516dd8",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-662p-52hx-cmh2",
      "aliases": [
        "CVE-2026-107812",
        "GHSA-662p-52hx-cmh2",
        "GO-2026-6705"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "1.9.10-0.20250517140552-daee3ac7ade1"
                },
                {
                  "fixed": "1.9.10-0.20260728114330-580585516dd8"
                }
              ]
            }
          ],
          "package": {
            "name": "github.com/0xJacky/Nginx-UI",
            "purl": "pkg:golang/github.com/0xJacky/Nginx-UI",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-662p-52hx-cmh2/GHSA-662p-52hx-cmh2.json"
          }
        }
      ],
      "modified": "2026-10-19T21:40:58.486568803Z",
      "provider": "osv",
      "references": [
        "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-662p-52hx-cmh2",
        "https://github.com/0xJacky/nginx-ui/commit/580585516dd87a8b176bcdac258db70c3b64b7ec",
        "https://github.com/0xJacky/nginx-ui",
        "https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-494"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-10-09T17:08:21Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107812",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 376763,
  "published_at": "2026-10-09T17:08:21+00:00"
}

{
  "id": "00bbae8a84bce051476b5243414cb4e42e529b59fae0c8de0444ad86cc12ad2f",
  "url": "https://osv.dev/vulnerability/GO-2026-6705",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nginx UI: Self-upgrade runs an unsigned binary verified only by a same-origin digest → RCE via a compromised mirror or MITM in github.com/0xJacky/Nginx-UI",
    "summary": "Nginx UI: Self-upgrade runs an unsigned binary verified only by a same-origin digest → RCE via a compromised mirror or MITM in github.com/0xJacky/Nginx-UI",
    "evidence": "osv:GO-2026-6705",
    "products": [
      {
        "name": {
          "value": "github.com/0xJacky/Nginx-UI",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.9.10-0.20260728114330-580585516dd8",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "GO-2026-6705",
      "aliases": [
        "CVE-2026-107812",
        "GHSA-662p-52hx-cmh2",
        "GO-2026-6705"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "1.9.10-0.20250517140552-daee3ac7ade1"
                },
                {
                  "fixed": "1.9.10-0.20260728114330-580585516dd8"
                }
              ]
            }
          ],
          "package": {
            "name": "github.com/0xJacky/Nginx-UI",
            "purl": "pkg:golang/github.com/0xJacky/Nginx-UI",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://vuln.go.dev/ID/GO-2026-6705.json"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-19T21:31:49.314770793Z",
      "provider": "osv",
      "references": [
        "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-662p-52hx-cmh2",
        "https://github.com/0xJacky/nginx-ui/commit/580585516dd87a8b176bcdac258db70c3b64b7ec",
        "https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0"
      ],
      "provider_metadata": {
        "url": "https://pkg.go.dev/vuln/GO-2026-6705",
        "review_status": "UNREVIEWED"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107812",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 376686,
  "published_at": "2026-10-19T21:08:26+00:00"
}