CVE-2026-41575Network attack vector

Browser JavaScript execution via unsanitized DOM rendering

Published May 8, 2026 · Updated May 8, 2026

DOM-based XSS in th30d4y IP 1.0.1 through 2.0.0 allows remote attackers to execute JavaScript via crafted input. The browser-side IP reputation checker inserts unsanitized user-controlled values into the DOM as raw HTML rather than using textContent, so script markup is interpreted. No account is required, but a victim must interact with the crafted input; successful execution can read or alter data available to the application in that browser session.

CVSS severity6.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in th30d4y IP 1.0.1 through 2.0.0 allows remote attackers to execute JavaScript via crafted input. The browser-side IP reputation checker inserts unsanitized user-controlled values into the DOM as raw HTML rather than using textContent, so script markup is interpreted. No account is required, but a victim must interact with the crafted input; successful execution can read or alter data available to the application in that browser session.

The record

CVE
CVE-2026-41575
Published
May 8, 2026
Updated
May 8, 2026
Vendor
th30d4y
Product
IP
Classifications
CWE-80, CWE-79, CWE-85, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 1.0.1, < 2.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

th30d4y · IPversion=>= 1.0.1, < 2.0.1

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-85Doubled Character XSS Manipulations
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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