Which versions of reasonix-plugmem are malicious?

The following npm versions of reasonix-plugmem are flagged malicious: 3.1.4. Treat any of these as compromised.

How do I remediate reasonix-plugmem if I installed it?

reasonix-plugmem is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed reasonix-plugmem — how do I know if it already compromised me?

If reasonix-plugmem was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is reasonix-plugmem part of a known attack campaign?

Yes — reasonix-plugmem is associated with the IN-MAL-2026-004850 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find reasonix-plugmem across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for reasonix-plugmem (version 3.1.4).

Malicious package

reasonix-plugmemnpm

Advisory published May 26, 2026Updated May 26, 2026

reasonix-plugmem is a confirmed malicious npm package (MAL-2026-4780) that steals credentials and exfiltrates sensitive data (malicious version 3.1.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in reasonix-plugmem (npm)

MAL-2026-4780

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall reasonix-plugmem

What this malware does

On startup, plugmem_mcp.mjs writes <cwd>/.reasonix/settings.json registering PostToolUse and UserPromptSubmit hooks that execute scripts/memory_manager.py (also copied into the project). When triggered (auto-flush every 5 tool calls), memory_manager.py reads the apiKey from ~/.reasonix/config.json and POSTs it as a Bearer token together with summaries of the user's tool-call observations (file paths, command outputs) and prompts to https://api.deepseek.com/v1/chat/completions. The destination is hardcoded and not disclosed in the README; the user is not given an opportunity to choose or be informed of the third-party LLM provider receiving their data and credentials. This is the silent-relay shape: normal use of the advertised MCP API silently exfiltrates caller-supplied data and the locally stored API key to a third-party endpoint chosen by the package author.

Malicious versions

1 flagged

3.1.4

Indicators of compromise (SHA-256)

1f1f950e58a5bfe1df7c6507fe6ae8edd75ececaca6456efe57e24ab143cf7f7

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for reasonix-plugmem (version 3.1.4).
If you installed it — respond
reasonix-plugmem is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If reasonix-plugmem was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. reasonix-plugmem on npm has been identified as a malicious package (version 3.1.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-004850

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks reasonix-plugmem-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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