VulnerabilityModified
CVE-2019-10795
undefsafe before 2.0.3 is vulnerable to Prototype Pollution.
MEDIUM 6.3EPSS 1.09%
Does this matter?
Lower severity and a low EPSS score (1.09%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 1.09% probability · 65th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- undefsafe project/undefsafe
- Source
- report@snyk.io
EPSS 1.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/remy/undefsafe/commit/f272681b3a50e2c4cbb6a8533795e1453382c822Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940Exploit, Third Party Advisory
- https://github.com/remy/undefsafe/commit/f272681b3a50e2c4cbb6a8533795e1453382c822Patch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.