CVE-2026-27837 – Dottie vulnerable to prototype pollution bypass via non-first path segments in set() and transform()

CVE ID : CVE-2026-27837

Published : Feb. 26, 2026, 12:19 a.m. | 49 minutes ago

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.

Severity: 0.0 | NA

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