CVE-2019-10795 json
Prototype Pollution in undefsafe
published 2020-02-18 6 y ago modified 2026-09-10 1 mo ago also GHSA-332q-7ff2-57h2 , EUVD-2022-0772
- cvss
- 6.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
undefsafe before 2.0.3 is vulnerable to Prototype Pollution. The 'a' function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
Patch / fix
Exploit prediction
1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- snyk.io https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| GitHub | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | undefsafe | <2.0.3 |
2.0.3 |
Affected products
- Snyk undefsafe
Classification
- Weakness
-
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
References
-
github.com
/remy/undefsafe/commit/f272681b3a50e2c4cbb6a8533795e1453382c822
web, patch, third-party-advisory
-
snyk.io
/vuln/SNYK-JS-UNDEFSAFE-548940
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2019-10795
advisory
-
github.com
/remy/undefsafe
package
Sources
- CVE List CVE-2019-10795
- GitHub Advisory GHSA-332q-7ff2-57h2
- NVD CVE-2019-10795
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