CVE-2026-47356
Terrascan SSRF
Description
Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via the webhook_url parameter in the file scan endpoint (POST /v1/{iac}/{iacVersion}/{cloud}/local/file/scan) when running in server mode. An unauthenticated remote attacker can supply an arbitrary URL as the webhook_url multipart form parameter. After scanning the uploaded file, Terrascan sends an HTTP POST request to the attacker-controlled URL containing the full scan results as a JSON body, with the attacker-supplied webhook_token forwarded as a Bearer token in the Authorization header. The retryable HTTP client retries up to 10 times on failure. This affects deployments running terrascan in server mode (terrascan server), which binds to 0.0.0.0 with no authentication. Note: Terrascan was archived in August 2023 and no patch will be released.
INFO
Published Date :
May 19, 2026, 5:16 p.m.
Last Modified :
July 24, 2026, 12:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 5ac1ecc2-367a-4d16-a0b2-35d495ddd0be | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 5ac1ecc2-367a-4d16-a0b2-35d495ddd0be | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Disable terrascan server mode.
- Restrict network access to the server.
- Consider alternative scanning tools.
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-2026-47356.
| URL | Resource |
|---|---|
| https://github.com/tenable/terrascan | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47356 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-2026-47356
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-2026-47356 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47356 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. 24, 2026
Action Type Old Value New Value Added Translation Title: Terrascan de Tenable, Description: Terrascan v1.18.3 y anteriores son vulnerables a la Falsificación de Petición del Lado del Servidor (SSRF) a través del parámetro webhook_url en el endpoint de escaneo de archivos (POST /v1/{iac}/{iacVersion}/{cloud}/local/file/scan) cuando se ejecuta en modo servidor. Un atacante remoto no autenticado puede proporcionar una URL arbitraria como el parámetro de formulario multipart webhook_url. Después de escanear el archivo subido, Terrascan envía una petición HTTP POST a la URL controlada por el atacante que contiene los resultados completos del escaneo como un cuerpo JSON, con el webhook_token proporcionado por el atacante reenviado como un token Bearer en el encabezado Authorization. El cliente HTTP reintentable reintenta hasta 10 veces en caso de fallo. Esto afecta a las implementaciones que ejecutan terrascan en modo servidor (terrascan server), que se enlaza a 0.0.0.0 sin autenticación. Nota: Terrascan fue archivado en agosto de 2023 y no se lanzará ningún parche. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'tenable', 'product': 'Terrascan', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '1.18.3'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-47356', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-19T17:10:14.189839Z'} -
Initial Analysis by [email protected]
May. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:tenable:terrascan:*:*:*:*:*:*:*:* versions up to (including) 1.18.3 Added Reference Type Tenable Network Security, Inc.: https://github.com/tenable/terrascan Types: Product -
New CVE Received by [email protected]
May. 19, 2026
Action Type Old Value New Value Added Description Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via the webhook_url parameter in the file scan endpoint (POST /v1/{iac}/{iacVersion}/{cloud}/local/file/scan) when running in server mode. An unauthenticated remote attacker can supply an arbitrary URL as the webhook_url multipart form parameter. After scanning the uploaded file, Terrascan sends an HTTP POST request to the attacker-controlled URL containing the full scan results as a JSON body, with the attacker-supplied webhook_token forwarded as a Bearer token in the Authorization header. The retryable HTTP client retries up to 10 times on failure. This affects deployments running terrascan in server mode (terrascan server), which binds to 0.0.0.0 with no authentication. Note: Terrascan was archived in August 2023 and no patch will be released. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/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:N/S:U/C:H/I:N/A:N Added CWE CWE-918 Added Reference https://github.com/tenable/terrascan