CVE-2023-26139

Name: CVE-2023-26139
Creator: NVD / NIST
Published: 2023-08-01T05:15:34.843+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2023-26139 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Versions of the package underscore-keypath from 0.0.11 are vulnerable to Prototype Pollution via the name argument of the setProperty() function. Exploiting this vulnerability is possible due to improper input sanitization which allows the usage of arguments like “__proto__”.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

Versions of the package underscore-keypath from 0.0.11 are vulnerable to Prototype Pollution via the name argument of the setProperty() function. Exploiting this vulnerability is possible due to improper input sanitization which allows the usage of arguments like “__proto__”.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.74%

49.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Underscore-Keypath Project	Underscore-Keypath	>= 0.0.11

References

https://gist.github.com/lelecolacola123/cc0d1e73780127aea9482c05f2ff3252Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-UNDERSCOREKEYPATH-5416714Third Party Advisory
https://gist.github.com/lelecolacola123/cc0d1e73780127aea9482c05f2ff3252Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-UNDERSCOREKEYPATH-5416714Third Party Advisory

Timeline

Published: Aug 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-26139?

How severe is CVE-2023-26139?

CVE-2023-26139 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26139?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26139?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST