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Advisory record · GHSA-8394-6f8r-whxg

Terragrunt: Arbitrary File Deletion via Malicious Module Manifest

CVSS 6.9 MediumEPSS 0.0054 · 46th percentile

Published by the GitHub Advisory Database at 17 Aug 2026, 16:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/gruntwork-io/terragruntGo<1.0.41.0.4
Identifiers
GHSA-8394-6f8r-whxg · CVE-2026-45099 · GO-2026-6241
Weakness (CWE)
CWE-20 · CWE-22
Tags
Published
17 Aug 2026
Updated
18 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Terragrunt versions before 1.0.4 can delete arbitrary files on the local filesystem during module download when a remote module contains a maliciously crafted .terragrunt-module-manifest file. An attacker who gets Terragrunt to use an untrusted module can cause deletion of files the Terragrunt process can access, which may disrupt CI/CD pipelines or lose local files. Upgrade to Terragrunt 1.0.4, which fixes the issue; until then, audit remote module sources and use only trusted modules pinned to known commit SHAs.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0054, the 46th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:52 UTC First seen by agentprime
  2. 31 Oct 2026, 14:52 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.