@boomi/exosphere@8.1.4

A library of Web Components

AI Security Review

scanned 11h ago · by lpm-firewall-ai

Source confirms an automatic postinstall change to the consumer’s project-level MCP configuration, with environment-variable opt-outs and a server belonging to this package. This is a first-party agent extension lifecycle risk; the inspected excerpts do not establish broader agent control, credential transfer, or malicious execution.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source

Trigger

npm installation when the package is under node_modules and neither opt-out environment variable is set.

Impact

The consumer’s project-level agent configuration changes without an affirmative setup action; no broader configuration mutation or credential transfer was identified in the inspected hook and server excerpts.

Mechanism

The postinstall hook writes an Exosphere server entry to the consumer project’s .mcp.json, which can activate after the agent restarts.

AI rationale

Evidence

package.jsonscripts/postinstall-mcp.jsdist/mcp-server/index.js.mcp.json

Decision evidence

public snapshot

AI called this Suspicious at 93.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

package.json runs scripts/postinstall-mcp.js automatically after installation.
The hook skips when either EXOSPHERE_SKIP_MCP or npm_config_exosphere_skip_mcp is set; otherwise it operates from the consumer project root.
The hook targets the consumer project’s .mcp.json and configures this package’s MCP server.
The hook writes or updates the Exosphere server entry during installation without an affirmative consent prompt.
The configured server exposes Exosphere component and icon lookup tools over standard input and output.

Evidence against

The hook has explicit environment-variable opt-outs and skips when the package is not installed under node_modules.
The configured server is this package’s own MCP server; inspected tool registrations provide component and icon information.

Behavioral surface

Source

DynamicRequireEnvironmentVarsEvalFilesystemNetwork

Supply chain

HighEntropyStrings

Source & flagged code

12 flagged

package.jsonView file

•scripts.postinstall = node ./scripts/postinstall-mcp.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

dist/components/json-editor/json-editor.jsView file

1315padding: 0 8px; L1316: }`}),ace.define("ace/ext/searchbox",["require","exports","module","ace/lib/dom","ace/lib/lang","ace/lib/event","ace/ext/searchbox-css","ace/keyboard/hash_handler","ace/lib/keys","a... L1317: `,r:"\r",t:" ",'"':'"',"/":"/","\\":"\\"},W=97,M=(d.parse=function(u,l,c){var n={},s=0,o=0,i=0,a=c&&c.bigint&&typeof BigInt<"u";return{data:t("",!0),pointers:n};function t(I,$){e()...

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/components/json-editor/json-editor.jsView on unpkg · L1315

dist/mcp-server/index.jsView file

8var __hasOwnProp = Object.prototype.hasOwnProperty; L9: var __commonJS = (cb, mod) => function __require() { L10: return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/mcp-server/index.jsView on unpkg · L8

scripts/postinstall-mcp.jsView file

6Install-time AI-agent control hijack evidence: L25: L26: const mcpConfigPath = path.join(projectRoot, '.mcp.json'); L27: const mcpEntry = { ... L31: L32: let config = { mcpServers: {} }; L33: ... L36: config = JSON.parse(fs.readFileSync(mcpConfigPath, 'utf-8')); L37: if (!config.mcpServers) config.mcpServers = {}; L38: if (config.mcpServers.exosphere) { L39: // Already configured — update the entry in case the path changed between versions L40: config.mcpServers.exosphere = mcpEntry; L41: fs.writeFileSync(mcpConfigPath, JSON.stringify(config, null, 2) + '\n'); Payload evidence from scripts/postinstall-mcp.js: L6: L7: // When installed as a dependency, __dirname contains node_modules. L8: // When run directly (e.g. during exosphere development), it doesn't. ... L18: // - shell/zshrc:

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

scripts/postinstall-mcp.jsView on unpkg · L6

dist/components/index.jsView file

•path = dist/components/index.js kind = oversized_source_file sizeBytes = 4876148 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

dist/components/index.jsView on unpkg

dist/components/avatar/avatar.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 22

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/components/avatar/avatar.js#virtual:normalized:round1View on unpkg

dist/react/node/index.jsView file

•matchType = normalized_sha256 matchedPackage = @boomi/exosphere@8.1.3 matchedPath = dist/react/node/index.js matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.3 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/react/node/index.jsView on unpkg

dist/react/node/index.mjsView file

•matchType = normalized_sha256 matchedPackage = @boomi/exosphere@8.1.3 matchedPath = dist/react/node/index.mjs matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.3 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/react/node/index.mjsView on unpkg

dist/react/rich-text-editor/index.jsView file

•matchType = normalized_sha256 matchedPackage = @boomi/exosphere@8.1.3 matchedPath = dist/react/rich-text-editor/index.js matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.3 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/react/rich-text-editor/index.jsView on unpkg

dist/react/table/index.jsView file

•matchType = normalized_sha256 matchedPackage = @boomi/exosphere@8.1.3 matchedPath = dist/react/table/index.js matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.3 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/react/table/index.jsView on unpkg

•matchType = previous_version_dangerous_delta matchedPackage = @boomi/exosphere@8.1.2 matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.2 similarity = 0.967 summary = stored previous version shares package body but lacks this dangerous source file

High

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/react/table/index.jsView on unpkg

dist/react/rich-text-editor/index.mjsView file

•matchType = normalized_sha256 matchedPackage = @boomi/exosphere@8.1.3 matchedPath = dist/react/rich-text-editor/index.mjs matchedIdentity = npm:QGJvb21pL2V4b3NwaGVyZQ:8.1.3 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/react/rich-text-editor/index.mjsView on unpkg

Source & flagged code

12 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./scripts/postinstall-mcp.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

dist/components/json-editor/json-editor.jsView file

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/components/json-editor/json-editor.jsView on unpkg · L1315

dist/mcp-server/index.jsView file

Findings

1 Critical8 High5 Medium7 Low

CriticalAi Agent Control Hijackscripts/postinstall-mcp.js

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limiteddist/components/avatar/avatar.js#virtual:normalized:round1

HighKnown Malware Source Similaritydist/react/node/index.js

HighKnown Malware Source Similaritydist/react/node/index.mjs

HighKnown Malware Source Similaritydist/react/rich-text-editor/index.js

HighKnown Malware Source Similaritydist/react/table/index.js

HighKnown Malware Source Similaritydist/react/rich-text-editor/index.mjs

HighPrevious Version Dangerous Deltadist/react/table/index.js

MediumDynamic Requiredist/mcp-server/index.js

Affected versions and remediation

This report applies to @boomi/exosphere@8.1.4.

See all versions of @boomi/exosphere for other recorded verdicts.

Review the evidence and your use of @boomi/exosphere@8.1.4 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: 2026-10-22 14:20:55.111Z (UTC).

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