CVE-2026-47356: Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via the webhook_url parameter

Q: How do I fix CVE-2026-47356?

terrascan: upgrade to newer than 1.18.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-47356 being exploited?

CVE-2026-47356 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-47356 affect?

CVE-2026-47356 affects terrascan. Severity is high (CVSS 7.5). 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 r

Q: How urgent is CVE-2026-47356?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-47356 is a high-severity flaw (CVSS 7.5) affecting terrascan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-05-19
Last modified	2026-07-24

Publisher (CNA): Tenable Network Security, Inc. · Vendor: tenable

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-19 17:16 UTCPublished CVE record published
2026-07-24 12:10 UTCUpdated Record last modified

tenable terrascan UPGRADE

Affected: <= 1.18.3

Fixed in: newer than 1.18.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy terrascan || rpm -q terrascan || terrascan --version

2. UPGRADE to newer than 1.18.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade terrascan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade terrascan

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-47356?

terrascan: upgrade to newer than 1.18.3. Exact commands for each OS are on this page.

Is CVE-2026-47356 being exploited?

CVE-2026-47356 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-47356 affect?

CVE-2026-47356 affects terrascan. Severity is high (CVSS 7.5). 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 r

How urgent is CVE-2026-47356?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-47357 HIGH 7.5 UPGRADE Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via the remote_url parameter
CVE-2026-47358 HIGH 7.5 UPGRADE Terrascan v1.18.3 and prior are vulnerable to Server-Side Request Forgery (SSRF) via external URL resolution i

References

← Back to latest CVEs