@lensmcp/client-runtime@1.25.37
LensMCP browser-side capture layer — errors, console, fetch, and route changes streamed to the LensMCP bridge. Import '@lensmcp/client-runtime/auto' for a zero-build install in any host.
AI Security Review
scanned 6d ago · by lpm-firewall-aiThis browser capture package has a legitimate observability purpose, but its side-effecting `/auto` entry also enables replay by default and can upload page content with inputs unmasked. Because that runtime collection is not disclosed in the package documentation, classify it as suspicious telemetry rather than malicious collection.
Static reason
No blocking static signals were detected.
Trigger
Importing `@lensmcp/client-runtime/auto` in a browser; replay can be disabled explicitly.
Impact
Page content and interaction details, potentially including unmasked input values, may be sent to the configured bridge without replay being disclosed in the package documentation.
Mechanism
The runtime records page replay data, including DOM and interactions, and posts chunks to the HTTP(S) endpoint derived from its configured WebSocket bridge. Inputs are not masked by default; only `[data-lens-private]` is blocked by default.
AI rationale
This browser capture package has a legitimate observability purpose, but its side-effecting `/auto` entry also enables replay by default and can upload page content with inputs unmasked. Because that runtime collection is not disclosed in the package documentation, classify it as suspicious telemetry rather than malicious collection.
Evidence
auto.jslib/auto.jslib/replay/recorder.jslib/replay/types.jslib/replay/uploader.jsREADME.mdpackage.json
Network endpoints3
ws://<configured-host>:<configured-port> (default port 5747; host falls back to location.hostname or 127.0.0.1)http(s)://<same configured host>/replayhttp(s)://<same configured host>/replay/blob
Decision evidence
public snapshotAI called this Suspicious at 87.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- Importing the `/auto` entry immediately calls `installLensmcp()`.
- Auto-install starts replay unless explicitly disabled through options, a global flag, or a meta tag.
- Replay records browser DOM and interaction data, then uploads replay chunks to the configured endpoint.
- Replay privacy defaults set `maskAllInputs` to false and block only elements marked `[data-lens-private]`.
- The README and package description disclose error, console, fetch, and route streaming but do not mention automatic session replay.
Evidence against
- The package’s stated purpose is browser observability and capture, and its README describes connecting to a LensMCP bridge.
- The main `index.js` entry only exports functions; the side effect is isolated to the explicitly named `/auto` entry.
- The default bridge is local, and the replay code supports disabling replay.
Behavioral surface
NetworkWebSocket
HighEntropyStringsMinified
Source & flagged code
7 flaggedauto.jsView file
1"use strict";import{installLensmcp as s}from"./lib/auto.js";s();export{installLensmcp,resolveLensmcpWsUrl,resolveLensmcpWsToken}from"./lib/auto.js";
Medium
Ai Review Evidence
Importing the `/auto` entry immediately calls `installLensmcp()`.
auto.jsView on unpkg · L1lib/auto.jsView file
1replayWanted(e.replay)&&u(t.wsUrl,n,o)}r(installLensmcp,"installLensmcp"),s(installLensmcp,"installLensmcp"),c(installLensmcp,"installLensmcp");export function replayWanted(e){if(e===!1||globalThis.__LENSMCP_REPLAY__===!1)return!1;const t=i("lensmcp-replay")?.toLowerCase();return t!=="off"&&t!=="false"&&t!=="0"}r(replayWanted,"replayWanted"),s(replayWanted,"replayWanted"),c(replayWanted,"replayWanted");function u(e,t,n){const o=replayEn
Medium
Ai Review Evidence
Auto-install starts replay unless explicitly disabled through options, a global flag, or a meta tag.
lib/auto.jsView on unpkg · L1lib/replay/recorder.jsView file
Findings
8 Medium3 Low
MediumNetwork
MediumAi Review Evidenceauto.js
MediumAi Review Evidencelib/auto.js
MediumAi Review Evidencelib/replay/recorder.js
MediumAi Review Evidencelib/replay/uploader.js
MediumAi Review Evidencelib/replay/types.js
MediumAi Review EvidenceREADME.md
MediumAi Review Evidencepackage.json
LowHigh Entropy Strings
LowTelemetry
LowUrl Strings
Affected versions and remediation
This report applies to @lensmcp/client-runtime@1.25.37.
See all versions of @lensmcp/client-runtime for other recorded verdicts.
- Review the evidence and your use of @lensmcp/client-runtime@1.25.37 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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