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Vulnerability · Published Nov 3, 2026 · Assigned by GitHub_M

CVE-2026-64672Terragrunt catalog predictable temp symlink clobber

Medium 4.4

In plain English

A medium-severity security flaw in terragrunt from gruntwork-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)4.4Medium
Exploit odds (30 days)0.2%top 93.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu or Terraform to scale. Prior to 1.1.1, the terragrunt catalog command derives a predictable per-repository catalog clone root under the shared system temporary directory and follows a symlink already placed at that path. A local attacker who can write to the temporary directory and predict the cataloged repository can redirect cleanup and cloning outside the intended root, causing an existing repository-named directory to be deleted and replaced in the victim's security context. The attack requires the victim to run terragrunt catalog on a shared host while the symlink is present, and it is not remotely exploitable. This issue is fixed in version 1.1.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/gruntwork-io/terragrunt1.1.1GHSA-wv6g-x823-wx9m
Gogithub.com/gruntwork-io/terragrunt1.1.1GO-2026-6768

Affected products (as reported)

VendorProductVersions
gruntwork-io terragrunt < 1.1.1

Weakness: CWE-59, CWE-377 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

References