hippo-memory@1.38.1

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

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The code establishes a guarded automatic repair chain that can modify a Codex launcher after installation. It does not meet the stated block threshold because fresh installation requires explicit setup and no complete malicious lifecycle chain was found.

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

npm installation after a user has previously run the Codex wrapper setup command

Impact

A package update can alter an existing Codex command path and retain access to subsequent session transcripts.

Mechanism

Postinstall-triggered repair of an AI-agent launcher wrapper

AI rationale

Evidence

scripts/postinstall.cjsdist/postinstall.jsdist/hooks.js~/.hippo/integrations/codex.json

Decision evidence

public snapshot

AI called this Suspicious at 90.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

The install lifecycle loads and runs the shipped postinstall module.
Postinstall calls repair logic for an existing Codex wrapper.
The repair path can replace a Codex launcher when Hippo metadata exists.
The package text addresses supply-chain scanners while discussing binary replacement.

Evidence against

No runtime dependency on another hippo-memory release is declared.
First-time wrapper installation is limited to an explicit Hippo command.
The inspected embedding requests use configured provider endpoints and API keys, not an unrelated collection host.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell

Supply chain

HighEntropyStringsMinifiedUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

11 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/rerankers/cross-encoder.jsView file

Lines 1-29javascript

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

2const MODEL_NAME = 'Xenova/ms-marco-MiniLM-L-6-v2';

3// Use Function constructor to bypass TypeScript static module resolution

4// for optional peer dependencies that may not be installed (mirrors the

5// pattern in src/embeddings.ts).

6// SAFETY: this declares the contract we require from the dynamically

dist/db.jsView file

Lines 1-28javascript

1import * as fs from 'fs';

2import * as os from 'os';

3import * as path from

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/project-identity.jsView file

•matchType = normalized_sha256 matchedPackage = hippo-memory@1.24.0 matchedPath = dist/project-identity.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/project-identity.jsView on unpkg

dist/src/project-identity.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/project-identity.jsView 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@1.39.0 matchedIdentity = npm:aGlwcG8tbWVtb3J5:1.39.0 similarity = 0.800 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

11 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/rerankers/cross-encoder.jsView file

9// isPipelineFactory before it is ever invoked. L10: const _dynImport = new Function('s', 'return import(s)'); L11: const _require = createRequire(import.meta.url);

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/rerankers/cross-encoder.jsView on unpkg · L9

Findings

8 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/project-identity.js

HighKnown Malware Source Similaritydist/src/project-identity.js

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/db.js

MediumNetwork

Medium

Affected versions and remediation

This report applies to hippo-memory@1.38.1.

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

Review the evidence and your use of hippo-memory@1.38.1 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: 2026-09-14 14:03:07.688Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface

Source & flagged code