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CVE-2026-54756— Jodit Editor: Prototype pollution via Jodit.configure() / ConfigMerge

Quick assessment

Affected
xdan jodit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Valerii jodit是Valerii个人开发者的一款网页文本编辑器插件。 Valerii jodit 4.12.18之前版本存在输入验证错误漏洞，该漏洞源于未过滤原型突变键，可能导致原型污染。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.46% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
xdan jodit < 4.12.18 affected
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I. Basic Information for CVE-2026-54756

Vulnerability Information
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Vulnerability Title
Jodit Editor: Prototype pollution via Jodit.configure() / ConfigMerge
Source: CVE Program / CVE List V5
Vulnerability Description
Jodit Editor is a WYSIWYG editor with written in pure TypeScript file and image editing capabilities. In versions prior to 4.12.18, Jodit.configure(options) — and the internal ConfigMerge / ConfigProto helpers — merged user-supplied options into the editor configuration without filtering prototype-mutating keys, potentially causing a Prototype Pollution vulnerability. A payload nested under an existing plain-object option such as controls could reach and mutate Object.prototype. Applications that pass user-controlled or partially user-controlled configuration into Jodit.configure() may be vulnerable. This issue was fixed in version 4.12.18.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Valerii jodit 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Valerii jodit是Valerii个人开发者的一款网页文本编辑器插件。 Valerii jodit 4.12.18之前版本存在输入验证错误漏洞，该漏洞源于未过滤原型突变键，可能导致原型污染。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
xdan jodit < 4.12.18 -

II. Public POCs for CVE-2026-54756

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III. Intelligence Information for CVE-2026-54756

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Vendor Advisories for CVE-2026-54756 (1)

Same Patch Batch · xdan · 2026-07-01 · 3 CVEs total

CVE-2026-58263 7.2 HIGH Jodit Editor: Mutation XSS in jodit clean-html via a MathML/style rawtext carrier
CVE-2026-55886 Jodit Editor: Prototype Pollution in Jodit via Jodit.modules.Helpers.set()

IV. Related Vulnerabilities

Same product: jodit
Same vendor: xdan
Same weakness: CWE-1321