hippo-memory@1.42.0

Biologically-inspired memory system for AI agents. Decay by default, strength through use.

AI Security Review

scanned 14d ago · by lpm-firewall-ai

The flagged postinstall and agent-configuration behavior is bounded: postinstall does not perform first-time agent setup, and hook installation is user-invoked. The inspected prediction, capture, and embedding-provider code does not establish malicious behavior or unrelated credential forwarding.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source

Trigger

Package installation runs the postinstall script; hook installation requires the user to run `hippo init` or a hook command.

Impact

No confirmed attack surface was established in the inspected code.

Mechanism

Postinstall checks for an existing Codex wrapper before repair and prints opt-in commands. Project hook setup detects agent files in the current directory and is invoked by `hippo init`.

AI rationale

Decision evidence

public snapshot

AI called this Clean at 89.0% confidence as Benign with low false-positive risk.

Evidence for AI clean decision

package.json defines a postinstall script that loads the package’s postinstall module.
The postinstall module repairs a Codex wrapper only if one is already installed and prints setup instructions; it does not perform first-time wrapper installation.
The `hippo init` path calls hook installation, and its detectors look for agent configuration in the current project.
The capture and prediction files contain ordinary package functionality; the two prediction files have identical inspected source at the cited location.
The embedding provider batches text for its configured provider; the inspected code does not establish credential forwarding to an unrelated recipient.

Evidence against

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell

Supply chain

HighEntropyStringsMinified

Source & flagged code

9 flagged

package.jsonView file

Lines 15-55json

15 "bin": {

16 "hippo": "bin/hippo.js"

17 },

18 "files": [

19 "dist",

20 "dist-ui",

21 "bin",

22 "scripts/postinstall.cjs",

23 "openclaw.plugin.json",

24 "extensions/openclaw-plugin"

25 ],

26 "scripts": {

27 "baseline": "npm run build && npm test",

28 "build": "tsc && tsc -p tsconfig.benchmarks.json && tsc -p tsconfig.extensions.json",

29 "dev": "tsc --watch",

30 "pretest": "npm run build",

31 "test": "vitest run",

32 "test:watch": "vitest",

33 "lint": "oxlint",

34 "audit:security": "npm audit --audit-level=high && npm --prefix ui audit --audit-level=high",

35 "postinstall": "node scripts/postinstall.cjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L35

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L35

36 "smoke:pack": "node scripts/smoke-pack.mjs",

37 "smoke:openclaw-install": "node scripts/smoke-openclaw-install.mjs",

38 "build:ui": "cd ui && npm install && npm run build",

39 "build:all": "npm run build && npm run build:ui",

40 "prepublishOnly": "node scripts/check-manifest-versions.mjs && node scripts/check-em-dashes-in-release-notes.mjs && node scripts/check-graph-writes.mjs && npm run build:all && node scripts/check-openclaw-dist.mjs && npm run smoke:openclaw-install && node scripts/check-tests-pass.mjs"

41 },

42 "keywords": [

43 "memory",

44 "ai",

45 "agents",

46 "llm",

47 "claude",

48 "context",

49 "recall",

50 "episodic",

51 "semantic",

52 "embeddings",

53 "hybrid-search"

54 ],

55 "author": "Keith",

dist/embeddings.jsView file

Lines 78-118javascript

78 * official inference code in `FlagEmbedding`); MiniLM and most sentence-

79 * transformers models use mean pooling. Unknown model ids default to mean

80 * — that is the safe choice because most third-party models adopt the

81 * sentence-transformers convention, and the

dist/rerankers/cross-encoder.jsView file

Lines 1-23javascript

1import { createRequire } from 'node:module';

2import { pathToFileURL } from 'node:url';

3const MODEL_NAME = 'Xenova/ms-marco-MiniLM-L-6-v2';

4const _require

dist/hooks.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. } } } return out; } function [redacted](historypath, startoffsetbytes) { if (!fs.existssync(historypath)) return []; const raw = fs.readfilesync(historypath); if (startoffsetbytes >= raw.length) return []; const delta = raw.subarray(startoffsetbytes).tostring('utf8'); const seen = new set(); const ordered = []; for (const line of delta.split('\n')) { if (!line.trim()) continue; try { const parsed = json.parse(line); const sessionid = parsed.session_id; if (isjsonstring(sessionid) && sessionid && !seen.has(sessionid)) { seen.add(sessionid);

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

dist/hooks.jsView on unpkg

dist/embedding-provider.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 9

High

Semantic Analysis Limited

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

dist/embedding-provider.js#virtual:normalized:round1View on unpkg

dist/predictions.jsView file

•matchType = normalized_sha256 matchedPackage = hippo-memory@1.24.0 matchedPath = dist/predictions.js matchedIdentity = npm:aGlwcG8tbWVtb3J5:1.24.0 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/predictions.jsView on unpkg

dist/src/predictions.jsView file

High

Known Malware Source Similarity

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

dist/src/predictions.jsView on unpkg

dist/cli.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = hippo-memory@1.40.0 matchedIdentity = npm:aGlwcG8tbWVtb3J5:1.40.0 similarity = 0.933 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/cli.jsView on unpkg

Source & flagged code

9 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.cjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.cjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/embeddings.jsView file

98// Promise<object> names that honestly without claiming a specific module shape. L99: const _dynImport = new Function('s', 'return import(s)'); L100: /**

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/embeddings.jsView on unpkg · L98

Findings

6 High5 Medium6 Low

HighInstall Time Lifecycle Scriptspackage.json

HighTrigger Reachable External Ai Agent Control Surface Mutationdist/hooks.js

HighSemantic Analysis Limiteddist/embedding-provider.js#virtual:normalized:round1

HighKnown Malware Source Similaritydist/predictions.js

HighKnown Malware Source Similaritydist/src/predictions.js

HighPrevious Version Dangerous Deltadist/cli.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requiredist/rerankers/cross-encoder.js

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

Affected versions and remediation

This report applies to hippo-memory@1.42.0.

See all versions of hippo-memory for other recorded verdicts.

Review the evidence and your use of hippo-memory@1.42.0 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: 2026-10-09 05:42:39.001Z (UTC).

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