---
canonical: "https://firewall.lpm.dev/npm/chai-as-bench"
markdown: "https://firewall.lpm.dev/npm/chai-as-bench/report.md"
package: "chai-as-bench"
report_status: "published"
title: "chai-as-bench@7.0.3 npm security report"
verdict: "malicious"
version: "7.0.3"
---

# chai-as-bench@7.0.3 npm security report

> **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document.

## Verdict summary
**Blocked by malware advisory** — OpenSSF/OSV malware advisory MAL-2026-13699 identifies this version as malicious and supplies the Firewall block.

- **Verdict:** Malicious
- **Product-default install policy:** Block
- **Firewall policy:** Trusted malware advisory block
- **Public report status:** Published
- **Threat category:** Malware
- **Selected version:** 7.0.3
- **Selected version is latest:** Yes
- **Analysis source:** OpenSSF/OSV Malicious Advisory (OpenSSF/OSV)

OpenSSF/OSV malware advisory MAL-2026-13699 identifies this version as malicious and supplies the Firewall block.

OpenSSF/OSV advisory MAL-2026-13699 confirms this npm version as malicious. The package presents itself as a chai plugin (name resembles chai-as-promised, manifest description references chai assertions), but ships no chai-related functionality. index.js unconditionally loads lib/config.js on require(), and lib/config.js is a ~4 MB obfuscator.io payload with a 23,890-entry rotating string array, hex-obfuscated identifiers, and control-flow flattening. The remaining lib/ files (proto.js,...

## Latest scan
- **Scanner version:** external-osv-malicious-v1
- **Recorded final verdict:** Malicious
- **Recorded analysis confidence:** 100.0%
- **Started:** 2026-08-10T13:20:05.956Z
- **Finished:** 2026-08-10T13:20:05.956Z
- **Download time:** Not available
- **Static scan time:** Not available
- **AI review time:** Not available
- **Total time:** Not available

The recorded confidence comes from the underlying analysis. Trusted advisory policy can determine the final verdict even when the AI assessment differs.

## Security analysis

No additional public attack-surface or AI-review details are available.

## Affected versions and remediation

This report applies to chai-as-bench@7.0.3.

- Avoid installing chai-as-bench@7.0.3. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

## Public findings

### 1. High: Osv Malicious Advisory
- **Category:** External Intel
- **Confidence:** 100.0%

The package presents itself as a chai plugin (name resembles chai-as-promised, manifest description references chai assertions), but ships no chai-related functionality. index.js unconditionally loads lib/config.js on require(), and lib/config.js is a ~4 MB obfuscator.io payload with a 23,890-entry rotating string array, hex-obfuscated identifiers, and control-flow flattening. The remaining lib/ files (proto.js, multistream.js, transport.js) plus LICENSE are copied verbatim from the unrelated pino logger project as camouflage, and index.js itself only exports a no-op Express-style middleware ((\_req,\_res,next)=\>next()). README contains placeholder yourusername GitHub URLs and generic author metadata (james@abscond.org). Heavy obfuscation of a multi-megabyte payload that runs on every require(), inside a package whose advertised purpose does not require any such code and whose surrounding files are stolen from an unrelated project, is the standard loader/stealer shape for an npm supply-chain plant targeting developers who mistype chai-as-promised.

## Dependencies and install lifecycle
- **Lifecycle scripts present:** No

- **Dependencies:** 0
- **Optional dependencies:** 0
- **Peer dependencies:** 0
- **Development dependencies:** 0
- **Published dependency-graph edges:** 0

## Package metadata
- **Package:** chai-as-bench
- **Ecosystem:** npm
- **Version:** 7.0.3
- **Version published:** 2026-07-21T02:30:34.423Z
- **Package first seen:** 2026-08-10T13:20:05.956Z
- **Package last seen:** 2026-08-10T13:20:05.956Z
- **Known versions:** 1
- **Latest version:** 7.0.3
- **Appeal under review:** No

## References
- [HTML security report](<https://firewall.lpm.dev/npm/chai-as-bench>)
- [OpenSSF/OSV advisory](<https://osv.dev/vulnerability/MAL-2026-13699>)
- [PACKAGE](<https://www.npmjs.com/package/chai-as-bench/v/7.0.3>)