CVE-2026-45099Network attack vector

Arbitrary file deletion via unbounded manifest paths

Published Aug 21, 2026 · Updated Aug 25, 2026

Path traversal in Gruntwork Terragrunt before 1.0.4 allows remote attackers to delete local files via a malicious external module. During fileManifest.Clean() in internal/util/file.go, cleanup trusts decoded .terragrunt-module-manifest entries without confining them to the module cache. Exploitation requires Terragrunt to download the crafted module; deletion is limited to files accessible to its process and can disrupt CI/CD pipelines.

CVSS severity6.9
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Gruntwork Terragrunt before 1.0.4 allows remote attackers to delete local files via a malicious external module. During fileManifest.Clean() in internal/util/file.go, cleanup trusts decoded .terragrunt-module-manifest entries without confining them to the module cache. Exploitation requires Terragrunt to download the crafted module; deletion is limited to files accessible to its process and can disrupt CI/CD pipelines.

The record

CVE
CVE-2026-45099
Published
Aug 21, 2026
Updated
Aug 25, 2026
Vendor
Gruntwork
Product
Terragrunt
Classifications
CWE-22, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=< 1.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gruntwork · Terragruntversion=< 1.0.4

Published CVSS scores

6.9GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

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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