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Fencer Vulns
high 7.5

CVE-2023-26113 json

Collection.js vulnerable to Prototype Pollution

published 2023-03-18 3 y ago modified 2026-06-17 4 mo ago also GHSA-47pj-q2vm-46xc , EUVD-2023-0860

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

Versions of the package collection.js before 6.8.1 are vulnerable to Prototype Pollution via the extend function in Collection.js/dist/node/iterators/extend.js.

Patch / fix

  • npm collection.js 6.8.1
  • n/a collection.js 6.8.1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/kobezzza/Collection/issues/27 referenced PoC, tagged "exploit" by a source, unverified
  • security.snyk.io https://security.snyk.io/vuln/SNYK-JS-COLLECTIONJS-3185148 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 collection.js
<6.8.1
6.8.1

Affected products

  • n/a collection.js

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

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.