CVE-2026-47358Network attack vector

Unauthenticated file read via IaC URL resolution

Published May 19, 2026 · Updated May 19, 2026

SSRF in Tenable Terrascan 1.18.3 and earlier allows remote attackers to read local files through uploaded IaC templates. ARM templateLink.uri and parametersLink.uri fields and CloudFormation Stack TemplateURL values pass to hashicorp/go-getter with FileDetector enabled, so attacker-selected HTTP and file URLs are fetched without scheme or destination restrictions. Exposure requires unauthenticated server mode; a crafted upload can reach internal network resources or disclose files readable by the Terrascan process.

CVSS severity9.2
Critical
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Tenable Terrascan 1.18.3 and earlier allows remote attackers to read local files through uploaded IaC templates. ARM templateLink.uri and parametersLink.uri fields and CloudFormation Stack TemplateURL values pass to hashicorp/go-getter with FileDetector enabled, so attacker-selected HTTP and file URLs are fetched without scheme or destination restrictions. Exposure requires unauthenticated server mode; a crafted upload can reach internal network resources or disclose files readable by the Terrascan process.

The record

CVE
CVE-2026-47358
Published
May 19, 2026
Updated
May 19, 2026
Vendor
Tenable
Product
Terrascan
Classifications
CWE-610, CWE-73, CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=1.18.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tenable · Terrascanversion=0 <=1.18.3

Published CVSS scores

9.2Tenable Network Security, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
7.5Tenable Network Security, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.6NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/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-610Externally Controlled Reference to a Resource in Another Sphere
CWE-73External Control of File Name or Path
CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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