CVE-2026-45136: Claude code cache fix Claude-code-cache-fix Vulnerable To Local Code Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g3xq-3gmv-qq8g",
  "modified" : "2026-06-08T23:54:32Z",
  "published" : "2026-05-13T15:31:41Z",
  "aliases" : [ "CVE-2026-45136" ],
  "summary" : "claude-code-cache-fix vulnerable to local code execution via Python triple-quote injection in tools/quota-statusline.sh",
  "details" : "## Summary\n\n`tools/quota-statusline.sh` (introduced in v3.5.0) interpolates Claude Code's hook stdin payload directly into a Python triple-quoted string literal. A `'''` byte sequence in any user-controlled field of the payload closes the literal early and lets following bytes execute as Python in the user's Claude Code process.\n\n## Affected versions\n\n- v3.5.0\n- v3.5.1\n\n## Patched versions\n\n- v3.5.2\n\n## Affected configurations\n\nUsers who wired `tools/quota-statusline.sh` into Claude Code's `statusLine` configuration. The v3.5.0 README explicitly recommends this setup, so most users on v3.5.0/v3.5.1 with the recommended setup are affected.\n\n## Attack chain\n\nClaude Code's statusline hook payload reflects user-controlled paths (`cwd`, `workspace.current_dir`, `workspace.project_dir`, `transcript_path`). Apostrophes are legal in POSIX filesystem paths.\n\n1. A hostile directory name containing `'''+payload+'''` lands on disk via any normal vector — `git clone`, archive extraction, npm package, downloaded zip, etc.\n2. The victim has the recommended `tools/quota-statusline.sh` wired into their CC `statusLine` config.\n3. The victim `cd`s anywhere a hostile path is reachable.\n4. CC fires the statusline hook on every redraw. The Python literal closes early. The injected bytes execute as Python in the user's process.\n\n## Severity\n\nLocal code execution at user privilege. Persistent re-fire on every statusline redraw. No user interaction beyond `cd`-ing into the hostile path. The user's shell, CC session, files, SSH keys, and any locally-accessible credentials are reachable from the executed code.\n\n## Vulnerable pattern\n\n```sh\ninput=$(cat)\nresult=$(python3 -c \"\n    stdin_data = json.loads('''$input''') if '''$input''' else {}\n\")\n```\n\n## Fix\n\nCapture stdin in bash, export to env, and pipe the Python source through a single-quoted heredoc (`<<'PYEOF'`). Single-quoting disables ALL bash interpolation inside the body. Python reads the JSON via `os.environ.get('CC_INPUT')`, where the bytes are inert at every layer.\n\n```sh\nCC_INPUT=$(cat)\nexport CC_INPUT\n\npython3 <<'PYEOF' 2>/dev/null\nimport os, json\ntry:\n    cc_input = json.loads(os.environ.get('CC_INPUT') or '{}')\nexcept Exception:\n    cc_input = {}\n# ...\nPYEOF\n```\n\n## Workarounds\n\nUntil upgrading to v3.5.2:\n\n- Disable the statusline by removing the `statusLine` entry from `~/.claude/settings.json`, or\n- Replace `tools/quota-statusline.sh` with a script that does NOT pass stdin through `python3 -c \"...\"` (a heredoc + env var rewrite is safe)\n\n## Credit\n\nReported by Jakob Linke (@schuay) via GitHub issue [#108](https://github.com/cnighswonger/claude-code-cache-fix/issues/108).\n\n## Timeline\n\n- 2026-05-07 — reported (#108)\n- 2026-05-07 — confirmed, fix implemented (#110)\n- 2026-05-07 — v3.5.2 published",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "claude-code-cache-fix"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.5.0"
      }, {
        "fixed" : "3.5.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cnighswonger/claude-code-cache-fix/security/advisories/GHSA-g3xq-3gmv-qq8g"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45136"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cnighswonger/claude-code-cache-fix/issues/108"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cnighswonger/claude-code-cache-fix/pull/110"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cnighswonger/claude-code-cache-fix/commit/613e4df30547f3e6baf32d161eddc828f171da17"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cnighswonger/claude-code-cache-fix"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78", "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-13T15:31:41Z",
    "nvd_published_at" : "2026-05-27T21:16:18Z"
  }
}