CVE-2021-42139 json
Deno Standard Modules before 0.107.0 allows Code Injection via an untrusted YAML file in certain configurations.
published 5y ago modified 4mo ago also EUVD-2021-29122
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
Deno Standard Modules before 0.107.0 allows Code Injection via an untrusted YAML file in certain configurations.
Patch / fix
Is CVE-2021-42139 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.07% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/denoland/deno_std/pull/1275 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/denoland/deno_std/pull/1275
exploit, third-party-advisory
-
github.com
/denoland/deno_std/releases/tag/0.107.0
release-notes, third-party-advisory
-
vuln.ryotak.me
/advisories/58
third-party-advisory
Sources
- CVE List CVE-2021-42139
- NVD CVE-2021-42139
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.