{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "com.linecorp.armeria:armeria-xds"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.40.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-11752"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-73"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-18T17:22:17Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## External Control of File Name or Path in xDS SDS DataSource\n\n### Summary\n\n`DataSourceStream` in the `:xds` module resolves control-plane-supplied `filename` and `environment_variable` fields from SDS Secret resources without any allow-list or base-directory confinement. A semi-trusted or compromised xDS control plane (or an attacker who can MITM SDS responses) can read arbitrary local files and environment variables on the xDS client host.\n\n**Affected component:** `xds/src/main/java/com/linecorp/armeria/xds/DataSourceStream.java`\n**Introduced in:** Armeria 1.38.0 (commit `b199560b10`, \"Add support for SDS\", #6597)\n**Affected versions:** 1.38.0, 1.39.0\n\n### Impact\n\nA semi-trusted or compromised xDS control plane (or an attacker who can inject/MITM SDS responses) can:\n\n- **Read arbitrary files** on the xDS client host \u2014 TLS private keys, `/etc/passwd`, mounted Kubernetes service-account tokens, cloud credential files, etc.\n- **Read arbitrary environment variables** \u2014 `AWS_SECRET_ACCESS_KEY`, CI tokens, database credentials, etc.\n\nThe read bytes are consumed as TLS key/cert/CA material. Combined with CWE-295 (silent disabling of upstream TLS peer verification), the exfiltrated secret can be presented to an attacker-chosen upstream, enabling data exfiltration. This is a confused-deputy / information-disclosure primitive driven entirely by control-plane-supplied configuration.\n\n**Severity:** High \u2014 arbitrary host-level file and environment variable read via control-plane-pushed configuration.\n\n### Patches\n\n1.40.0\n\nThe fix should:\n\n1. **Confine `filename` resolution** to an operator-configured allow-list of base directories. After normalization, reject any path that escapes the allow-listed root.\n2. **Gate `environment_variable`** behind an explicit operator allow-list of permitted variable names.\n3. **Default to denying** both `filename` and `environment_variable` DataSources for control-plane-delivered (SDS) secrets unless explicitly enabled by the operator. This is stricter than upstream Envoy but appropriate when the control plane is not fully trusted.\n4. **Document the trust model** clearly so operators understand that enabling file/env DataSources grants the control plane host-level read capability.\n\n### Workarounds\n\n- Ensure the xDS control plane channel is authenticated and encrypted (mTLS) to prevent MITM injection of malicious SDS responses.\n- Run the xDS client with minimal filesystem permissions and a restricted environment to limit the blast radius of arbitrary reads.\n- If SDS file-based secrets are not needed, consider using inline `DataSource` bytes only (delivered over the SDS stream itself) and auditing control-plane configurations to ensure no `filename` or `environment_variable` DataSources are present.",
  "id": "GHSA-hgw6-8c77-v4gq",
  "modified": "2026-06-18T17:22:17Z",
  "published": "2026-06-18T17:22:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/line/armeria/security/advisories/GHSA-hgw6-8c77-v4gq"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/line/armeria"
    },
    {
      "type": "WEB",
      "url": "https://github.com/line/armeria/security/advisories/xds/src/main/java/com/linecorp/armeria/xds/DataSourceStream.java"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Armeria: External Control of File Name or Path in xDS SDS DataSource"
}