What is CVE-2023-43646?

CVE-2023-43646 is a high-severity vulnerability in Chaijs Get-Func-Name, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2023-09-27.

How severe is CVE-2023-43646?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2023-43646 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Chaijs Get-Func-Name

CVE-2023-43646

get-func-name is a module to retrieve a function's name securely and consistently both in NodeJS and the browser. Versions prior to 2.0.1 are subject to a regular expression denial of service (redos) vulnerability which may lead to a denial of service when parsing malicious input. This vulnerability can be exploited when there is an imbalance in parentheses, which results in excessive backtracking and subsequently increases the CPU load and processing time significantly. This vulnerability can be triggered using the following input: '\t'.repeat(54773) + '\t/function/i'. This issue has been addressed in commit `f934b228b` which has been included in releases from 2.0.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Vulnerability class: DoS (Denial of Service)

Published 2023-09-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.014 · change: +0.003

Affected products

Chaijs Get-Func-Name — versions < 2.0.1

Weakness classification (CWE)

Public proof-of-concept exploits

References

github.com/chaijs/get-func-name/security/advisories/GHSA-4q6p-r6v2-jvc5 (Exploit, Third Party Advisory)
github.com/chaijs/get-func-name/commit/f934b228b5e2cb94d6c8576d3aac05493f667c69 (Patch)

Frequently asked questions

What is CVE-2023-43646?: CVE-2023-43646 is a high-severity vulnerability in Chaijs Get-Func-Name, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2023-09-27.
How severe is CVE-2023-43646?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2023-43646 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.