# CVE-2026-64672: Terragrunt catalog predictable temp symlink clobber

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

- fix: github.com/gruntwork-io/terragrunt (Go): OSV reports a fixed version 1.1.1. Check the advisory for supported release branches. (source: OSV GHSA-wv6g-x823-wx9m) — https://github.com/advisories/GHSA-wv6g-x823-wx9m

## Affected products and versions

- gruntwork-io / terragrunt: < 1.1.1 (affected). Source: CNA: GitHub_M
-  / github.com/gruntwork-io/terragrunt (github.com/gruntwork-io/terragrunt): ≥ 0; < 1.1.1 (affected, semver); OSV events: introduced 0; fixed 1.1.1. Source: OSV GHSA-wv6g-x823-wx9m

## Severity and prioritization

- CVSS 4.0: 4.4 (medium); 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; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-59, CWE-377

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/gruntwork-io/terragrunt/security/advisories/GHSA-wv6g-x823-wx9m (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/gruntwork-io/terragrunt/pull/6438 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/gruntwork-io/terragrunt/commit/668891c5a2ad2996f134bb8b00098754674ea94a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/gruntwork-io/terragrunt/releases/tag/v1.1.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-wv6g-x823-wx9m (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-wv6g-x823-wx9m (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-64672; retrieved 2026-11-03; source updated 2026-11-03

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-wv6g-x823-wx9m; retrieved 2026-11-03; source updated 2026-10-19

Revision: 68e837668abfc7c7007ff0600f95ff59f22822bf9f09aa733628ea39c11eda5c

Canonical: https://y2.dev/cve/CVE-2026-64672

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