CVE-2026-27837CRITICAL 9.8EPSS p21.8%

CVE-2026-27837CVE-2026-27837

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.30% probability of exploitation · percentile 21.8% · 2026-06-18T12:00:27Z
Published2026-02-26
Last modified2026-02-28

Underlying weaknesses· 1

CWE-1321

References

  1. https://github.com/advisories/GHSA-4gxf-g5gf-22h4
  2. https://github.com/mickhansen/dottie.js/commit/7e8fa1345a4b46325f0eab8d7aeb1c4deaefdb14
  3. https://github.com/mickhansen/dottie.js/security/advisories/GHSA-r5mx-6wc6-7h9w
  4. https://github.com/mickhansen/dottie.js/security/advisories/GHSA-r5mx-6wc6-7h9w

1

TypeTargetConfidenceTier
WeaknessImproperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')cwe-13210%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.