Arbitrary Code Injection

published 2022-03-17 4 y ago modified 2026-06-17 4 mo ago also GHSA-8m2f-74r2-x3f2 , EUVD-2022-1380

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits: 0; none known

All versions of package accesslog are vulnerable to Arbitrary Code Injection due to the usage of the Function constructor without input sanitization. If (attacker-controlled) user input is given to the format option of the package's exported constructor function, it is possible for an attacker to execute arbitrary JavaScript code on the host that this package is being run on.

Exploit prediction

1.64% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/vuln/SNYK-JS-ACCESSLOG-2312099 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C
GitHub	3.1	7.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	accesslog	<=0.0.2	no fix listed

Affected products

n/a accesslog

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

snyk.io /vuln/SNYK-JS-ACCESSLOG-2312099
web, exploit, third-party-advisory
github.com /carlos8f/node-accesslog/blob/master/lib/compile.js%23L6
web, broken-link
nvd.nist.gov /vuln/detail/CVE-2022-25760
advisory
github.com /carlos8f/node-accesslog
package

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