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CVE-2026-55886— Jodit Editor: Prototype Pollution in Jodit via Jodit.modules.Helpers.set()

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.

xdsoft Jodit Editor是xdsoft个人开发者开源的一款所见即所得编辑器。 xdsoft Jodit Editor 4.12.26之前版本存在输入验证错误漏洞，该漏洞源于通过Jodit.modules.Helpers.set(chain, value, obj)函数处理点分割链时未过滤原型突变键，可能导致原型污染攻击，引发意外的属性注入、逻辑绕过、拒绝服务或二次安全问题。

AI Predicted 7.5 Difficulty: Easy EPSS 0.53% · P45

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process

Affected Version Matrix 1

VendorProduct Version RangeStatus
xdan jodit < 4.12.26 affected
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I. Basic Information for CVE-2026-55886

Vulnerability Information
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Vulnerability Title
Jodit Editor: Prototype Pollution in Jodit via Jodit.modules.Helpers.set()
Source: CVE Program / CVE List V5
Vulnerability Description
Jodit Editor is a WYSIWYG editor with written in pure TypeScript file and image editing capabilities. Versions prior to 4.12.26 are vulnerable to Prototype Pollution through Jodit.modules.Helpers.set(chain, value, obj), which walks the dot-separated chain, creating and following each path segment without filtering prototype-mutating keys. A chain that begins with (or contains) __proto__, constructor, or prototype lets the final assignment reach and mutate Object.prototype. Applications that pass a user-controlled or partially user-controlled key path into Jodit.modules.Helpers.set() could be vulnerable, causing unexpected property injection, logic bypass, denial of service, or secondary security issues. This issue has been fixed in version 4.12.26.
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
xdsoft Jodit Editor 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xdsoft Jodit Editor是xdsoft个人开发者开源的一款所见即所得编辑器。 xdsoft Jodit Editor 4.12.26之前版本存在输入验证错误漏洞，该漏洞源于通过Jodit.modules.Helpers.set(chain, value, obj)函数处理点分割链时未过滤原型突变键，可能导致原型污染攻击，引发意外的属性注入、逻辑绕过、拒绝服务或二次安全问题。
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 < 4.12.26 -

II. Public POCs for CVE-2026-55886

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III. Intelligence Information for CVE-2026-55886

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Vendor Advisories for CVE-2026-55886 (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-2026-54756 Jodit Editor: Prototype pollution via Jodit.configure() / ConfigMerge

IV. Related Vulnerabilities

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