What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-30 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• thi-ng egf: before 0.4.0 — fixed in 0.4.0

How to fix

Upgrade to a fixed version: thi-ng egf 0.4.0. Check the vendor advisory for mitigations.

References

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

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