CVE-2026-34098
Guardian Language-System XSS via id Parameter in media.php
Description
Guardian language-system fails to sanitize the id GET parameter before inserting it into HTML source and form action attributes in media.php (lines 119, 129). An authenticated attacker can craft a URL that injects script tags executing in the victim's browser session.
INFO
Published Date :
July 1, 2026, 5:16 p.m.
Last Modified :
Oct. 25, 2026, 5:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
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 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Sanitize the 'id' GET parameter.
- Validate input before use.
- Update the affected script.
- Review all input sanitization.
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-2026-34098.
| URL | Resource |
|---|---|
| https://gist.github.com/cyberinforepo/d5b2771d82e1b31b8fc1c33052e08dad | |
| https://www.vulncheck.com/advisories/guardian-language-system-xss-via-id-parameter-in-media-php |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34098 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-2026-34098
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34098 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34098 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]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: language-system de guardian, Description: El sistema de lenguaje Guardian no logra sanear el parámetro GET ’id’ antes de insertarlo en el código fuente HTML y en los atributos ’action’ de los formularios en media.php (líneas 119, 129). Un atacante autenticado puede crear una URL que inyecta etiquetas ’script’ que se ejecutan en la sesión del navegador de la víctima. -
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/guardian/language-system', 'vendor': 'guardian', 'product': 'language-system', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'git', 'lessThanOrEqual': 'e42c395ec4b03fe62973a669c9209a673838b8a4'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/guardian/language-system', 'vendor': 'guardian', 'product': 'language-system', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'git', 'lessThanOrEqual': 'e42c395ec4b03fe62973a669c9209a673838b8a4'}], 'packageURL': 'pkg:github/guardian/language-system', 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 01, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34098', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-01T18:11:47.550931Z'} -
New CVE Received by [email protected]
Jul. 01, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/guardian/language-system', 'vendor': 'guardian', 'product': 'language-system', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'git', 'lessThanOrEqual': 'e42c395ec4b03fe62973a669c9209a673838b8a4'}], 'defaultStatus': 'affected'}] Added Description Guardian language-system fails to sanitize the id GET parameter before inserting it into HTML source and form action attributes in media.php (lines 119, 129). An authenticated attacker can craft a URL that injects script tags executing in the victim's browser session. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/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:L/UI:R/S:U/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://gist.github.com/cyberinforepo/d5b2771d82e1b31b8fc1c33052e08dad Added Reference https://www.vulncheck.com/advisories/guardian-language-system-xss-via-id-parameter-in-media-php