CVE-2020-7742 json
Prototype Pollution
published 2020-10-07 6 y ago modified 2026-07-08 4 mo ago also GHSA-9mx2-prfp-8hqp , EUVD-2021-1030
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
Summary
This affects the package simpl-schema before 1.10.2.
Patch / fix
- npm simpl-schema 1.10.2
- n/a simpl-schema 1.10.2
Exploit prediction
1.51% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/aldeed/simpl-schema/blob/main/package/lib/utility/merge.js referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | simpl-schema | <1.10.2 |
1.10.2 |
Affected products
- n/a simpl-schema
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/longshotlabs/simpl-schema/commit/50128841fa7fc2d137c36a397054279144caea3d
web
-
github.com
/aldeed/simpl-schema/blob/main/package/lib/utility/merge.js
exploit, third-party-advisory
-
snyk.io
/vuln/SNYK-JS-SIMPLSCHEMA-1016157
web, broken-link
-
nvd.nist.gov
/vuln/detail/CVE-2020-7742
advisory
-
github.com
/longshotlabs/simpl-schema/releases/tag/1.10.2
web
Sources
- CVE List CVE-2020-7742
- GitHub Advisory GHSA-9mx2-prfp-8hqp
- NVD CVE-2020-7742
Fencer Vulns 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.