CVE-2026-47099
TeleJSON < 6.0.0 DOM-based XSS via parse() Function
Description
TeleJSON prior to 6.0.0 contains a DOM-based cross-site scripting vulnerability in the parse() function that allows attackers to execute arbitrary JavaScript by delivering a crafted JSON payload containing a malicious _constructor-name_ property value. The custom reviver passes the constructor name directly to new Function() without sanitization when recreating object prototypes, enabling attackers to inject arbitrary JavaScript through vectors such as postMessage in cross-frame communication contexts to achieve script execution within the application.
INFO
Published Date :
May 20, 2026, 8:16 p.m.
Last Modified :
July 23, 2026, 12:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-47099
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | LOW | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update TeleJSON to version 6.0.0 or later.
- Sanitize user-supplied data before passing to new Function().
- Validate _constructor-name_ property values carefully.
Public PoC/Exploit Available at Github
CVE-2026-47099 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47099.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47099 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47099
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47099 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47099 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: TeleJSON de storybookjs, Description: TeleJSON anterior a la versión 6.0.0 contiene una vulnerabilidad de cross-site scripting basada en DOM en la función parse() que permite a los atacantes ejecutar JavaScript arbitrario mediante la entrega de una carga útil JSON manipulada que contiene un valor de propiedad _constructor-name_ malicioso. El reviver personalizado pasa el nombre del constructor directamente a new Function() sin sanitización al recrear prototipos de objetos, lo que permite a los atacantes inyectar JavaScript arbitrario a través de vectores como postMessage en contextos de comunicación entre marcos para lograr la ejecución de scripts dentro de la aplicación. -
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/storybookjs/telejson', 'vendor': 'storybookjs', 'product': 'telejson', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.0.0', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/storybookjs/telejson', 'vendor': 'storybookjs', 'product': 'telejson', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.0.0', 'versionType': 'semver'}], 'packageURL': 'pkg:github/storybookjs/telejson', 'defaultStatus': 'affected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/storybookjs/telejson', 'vendor': 'storybookjs', 'product': 'telejson', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.0.0', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-47099', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-20T19:28:02.710892Z'} -
CVE Modified by [email protected]
May. 21, 2026
Action Type Old Value New Value Added Reference https://github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-47099/cve-2026-47099.md -
New CVE Received by [email protected]
May. 20, 2026
Action Type Old Value New Value Added Description TeleJSON prior to 6.0.0 contains a DOM-based cross-site scripting vulnerability in the parse() function that allows attackers to execute arbitrary JavaScript by delivering a crafted JSON payload containing a malicious _constructor-name_ property value. The custom reviver passes the constructor name directly to new Function() without sanitization when recreating object prototypes, enabling attackers to inject arbitrary JavaScript through vectors such as postMessage in cross-frame communication contexts to achieve script execution within the application. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/storybookjs/telejson/security/advisories/GHSA-ccgf-5rwj-j3hv Added Reference https://www.vulncheck.com/advisories/telejson-dom-based-xss-via-parse-function