mde utilities contains Prototype Pollution

published 2023-02-28 3 y ago modified 2026-06-17 4 mo ago also GHSA-wxfj-84xf-7gxv , EUVD-2023-0815

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

All versions of the package utilities are vulnerable to Prototype Pollution via the _mix function.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 19 mo ago (2025-03-11)

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

security.snyk.io https://security.snyk.io/vuln/SNYK-JS-UTILITIES-3184491 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/mde/utilities/issues/29 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/E:P
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	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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	utilities	<=1.0.6	no fix listed

Affected products

n/a utilities

Classification

Weakness

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

security.snyk.io /vuln/SNYK-JS-UTILITIES-3184491
web, exploit, third-party-advisory
github.com /mde/utilities/issues/29
web, exploit, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-26105
advisory

Sources

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.

Summary