CVE-2026-55886Public exploitNetwork attack vector

Prototype pollution via unfiltered property-path segments

Published Jul 1, 2026 · Updated Jul 1, 2026

Prototype pollution in XDSoft Jodit before 4.12.26 allows attackers to alter inherited JavaScript properties through a crafted key path. Jodit.modules.Helpers.set() splits the dot-separated chain and creates or follows each segment without rejecting proto, constructor, or prototype, so its final assignment can mutate Object.prototype. Exploitation requires an application to pass an attacker-controlled or partly controlled path to this public API; resulting property injection can bypass logic or crash the application.

CVSS severity6.3
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in XDSoft Jodit before 4.12.26 allows attackers to alter inherited JavaScript properties through a crafted key path. Jodit.modules.Helpers.set() splits the dot-separated chain and creates or follows each segment without rejecting proto, constructor, or prototype, so its final assignment can mutate Object.prototype. Exploitation requires an application to pass an attacker-controlled or partly controlled path to this public API; resulting property injection can bypass logic or crash the application.

The record

CVE
CVE-2026-55886
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
XDSoft
Product
Jodit
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.12.26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

XDSoft · Joditversion=< 4.12.26

Published CVSS scores

6.3GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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