Is CVE-2026-47356 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-47356 being exploited in the wild.

How severe is CVE-2026-47356?

High severity, with a CVSS score of 7.5, published 19 May 2026.

Which products and versions are affected?

Tenable Terrascan v1.18.3 and prior.

Is there a fix for CVE-2026-47356?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-47356 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-47356?

Check whether you run Tenable Terrascan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-47356: Tenable Terrascan SSRF in file scan endpoint

CVE-2026-47356 · Severity: high · CVSS 7.5 · Published 2026-05-19

Terrascan, a tool used to detect security violations in cloud infrastructure code, contains a vulnerability when running in server mode. An unauthenticated attacker can trick the server into sending sensitive scan results to an external web address they control. Because the product has been archived and will not receive updates, this issue remains unpatched and could lead to the exposure of internal security configurations.

Technologies: Tenable Terrascan. Vendors: Tenable.

Quick answers

Is CVE-2026-47356 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-47356 being exploited in the wild.
How severe is CVE-2026-47356?: High severity, with a CVSS score of 7.5, published 19 May 2026.
Which products and versions are affected?: Tenable Terrascan v1.18.3 and prior.
Is there a fix for CVE-2026-47356?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-47356 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-47356?: Check whether you run Tenable Terrascan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Server-Side Request Forgery (SSRF) vulnerability exists in Terrascan's 'terrascan server' mode within the file scan endpoint (POST /v1/{iac}/{iacVersion}/{cloud}/local/file/scan). The application fails to validate the 'webhook_url' multipart form parameter, allowing an unauthenticated remote attacker to specify an arbitrary destination. Upon completion of a scan, the server sends an HTTP POST request containing the full JSON scan results and an attacker-provided bearer token to the specified URL. The server's HTTP client is configured to retry this request up to 10 times on failure. As the project was archived in August 2023, no patch is available.

Affected products

Tenable Terrascan v1.18.3 and prior

Timeline

2023-08: other: Project archived by vendor
2026-05-19: disclosed: CVE published

References

https://github.com/tenable/terrascan

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