What is CVE-2023-26102?

CVE-2023-26102 is a high-severity vulnerability in Rangy Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.5/10. Published 2023-02-24.

How severe is CVE-2023-26102?

High severity. CVSS v3 base score is 7.5 out of 10.

Prototype Pollution in Rangy Project

CVE-2023-26102

All versions of the package rangy are vulnerable to Prototype Pollution when using the extend() function in file rangy-core.js.The function uses recursive merge which can lead an attacker to modify properties of the Object.prototype

Vulnerability class: Prototype Pollution

Published 2023-02-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Rangy Project
Rangy — versions 0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

security.snyk.io/vuln/SNYK-JS-RANGY-3175702 (Exploit, Third Party Advisory)
github.com/timdown/rangy/issues/478 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-26102?: CVE-2023-26102 is a high-severity vulnerability in Rangy Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.5/10. Published 2023-02-24.
How severe is CVE-2023-26102?: High severity. CVSS v3 base score is 7.5 out of 10.