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Vulnerability record · CVE-2026-27837 · published 26 February 2026

CVE-2026-27837: Dottie project dottie prototype pollution vulnerability

Dottie Project · Dottie

Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-26132. The prototype pollution guard introduced in commit `7d3aee1` only validates the first segment of a dot-separated path, allowing an attacker to bypass the protection by placing `__proto__` at any position other than the first. Both `dottie.set()` and `dottie.transform()` are affected. Version 2.0.7 contains an updated fix to address the residual vulnerability.

9.8 CVSS 3.1 Critical EPSS 0.54% · top 56.9% CWE-1321 · Prototype pollution
9.8CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-26132. The prototype pollution guard introduced in commit `7d3aee1` only validates the first segment of a dot-separated path, allowing an attacker to bypass the protection by placing `__proto__` at any position other than the first. Both `dottie.set()` and `dottie.transform()` are affected. Version 2.0.7 contains an updated fix to address the residual vulnerability.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/advisories/GHSA-4gxf-g5gf-22h4 Not Applicable
https://github.com/mickhansen/dottie.js/commit/7e8fa1345a4b46325f0eab8d7aeb1c4deaefdb14 Patch
https://github.com/mickhansen/dottie.js/security/advisories/GHSA-r5mx-6wc6-7h9w ExploitVendor Advisory
https://github.com/mickhansen/dottie.js/security/advisories/GHSA-r5mx-6wc6-7h9w ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2023-26132Dottie project dottie prototype pollution vulnerabilityVersions of the package dottie before 2.0.4 are vulnerable to Prototype Pollution due to insufficient checks, via the set() function and the current …EPSS 1.1%8.6CVE-2026-34621Adobe Acrobat Reader prototype pollution leads to code executionAdobe Acrobat and Reader (versions 24.001.30356, 26.001.21367 and earlier) are affected by prototype pollution (CWE-1321) that can result in arbitrar…KEVEPSS 2.2%analysed

Source: NIST National Vulnerability Database (record CVE-2026-27837), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.