CVE-2026-45099

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu or Terraform to scale. Prior to 1.0.4, Terragrunt trusts paths decoded from a downloaded module's .terragrunt-module-manifest during fileManifest.Clean() in internal/util/file.go. A malicious or compromised external module can place absolute or traversal paths in the manifest, causing cleanup to delete files outside the module cache that are accessible to the Terragrunt process before OpenTofu or Terraform executes. This deletion-only primitive can remove local source code or configuration and disrupt CI/CD pipelines. This issue is fixed in version 1.0.4.

CVSS v3
6.9
EG Score
6.9MEDIUMmedium confidence
EG Risk
46
EG Risk 46/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity69% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 25, 2026

Advisory Details (4)

Auto-updated Aug 21, 2026
Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

v1.0.4

Patch available: gruntwork-io/terragrunt v1.0.4

https://github.com/gruntwork-io/terragrunt/releases/tag/v1.0.4
github_commit

commit 3d6f10d6bccc (gruntwork-io/terragrunt)

Fix landed in gruntwork-io/terragrunt commit 3d6f10d6bccc — awaiting tagged release

https://github.com/gruntwork-io/terragrunt/commit/3d6f10d6bccc851c6506a307a0b8675e0346e65e
github_pr

fix: manifest handling improvements

Fix merged in gruntwork-io/terragrunt PR #6032 on 2026-05-06 — awaiting tagged release

https://github.com/gruntwork-io/terragrunt/pull/6032
github Patch Available

Arbitrary File Deletion via Malicious Module Manifest · Advisory · gruntwork-io/terragrunt · GitHub

https://github.com/gruntwork-io/terragrunt/security/advisories/GHSA-8394-6f8r-whxg

Vendor Advisories for CVE-2026-45099(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/gruntwork-io/terragrunt—
  • every version up to 1.0.4: fixed in 1.0.4
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 17:48 UTCEG score recompute
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-02 08:17 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-10-01 09:06 UTCEG score recompute
  7. 2026-09-30 15:03 UTCEPSS rescore
  8. 2026-09-30 10:00 UTCEG score recompute
  9. 2026-09-29 06:18 UTCEG score recompute
  10. 2026-09-28 07:12 UTCEG score recompute
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-27 08:06 UTCEG score recompute
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-25 02:04 UTCEG score recompute
  15. 2026-09-23 20:27 UTCEG score recompute
  16. 2026-09-23 17:53 UTCEPSS rescore
  17. 2026-09-22 20:40 UTCEG score recompute
  18. 2026-09-20 20:19 UTCEG score recompute
  19. 2026-09-20 20:15 UTCEPSS rescore
  20. 2026-09-19 21:13 UTCEG score recompute
  21. 2026-09-18 21:56 UTCEG score recompute
  22. 2026-09-18 19:28 UTCEPSS rescore
  23. 2026-09-17 22:14 UTCEG score recompute
  24. 2026-09-17 19:31 UTCEPSS rescore
  25. 2026-09-16 23:07 UTCEG score recompute
Show 44 more
  1. 2026-09-16 14:08 UTCEPSS rescore
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 21:27 UTCEG score recompute
  4. 2026-09-13 23:11 UTCEG score recompute
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-13 00:05 UTCEG score recompute
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-12 00:59 UTCEG score recompute
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 09:37 UTCEPSS rescore
  11. 2026-09-11 01:53 UTCEG score recompute
  12. 2026-09-10 09:34 UTCEPSS rescore
  13. 2026-09-09 03:39 UTCEG score recompute
  14. 2026-09-08 22:00 UTCEPSS rescore
  15. 2026-09-07 16:11 UTCEG score recompute
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 13:57 UTCEG score recompute
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-04 15:39 UTCEG score recompute
  20. 2026-09-04 05:06 UTCEPSS rescore
  21. 2026-09-02 17:10 UTCEG score recompute
  22. 2026-09-02 14:12 UTCEPSS rescore
  23. 2026-09-01 14:22 UTCEG score recompute
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-08-31 15:11 UTCEG score recompute
  26. 2026-08-30 19:17 UTCEPSS rescore
  27. 2026-08-30 13:44 UTCEG score recompute
  28. 2026-08-30 01:22 UTCEPSS rescore
  29. 2026-08-29 14:38 UTCEG score recompute
  30. 2026-08-28 21:41 UTCEPSS rescore
  31. 2026-08-28 12:59 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescore
  33. 2026-08-27 13:38 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescore
  35. 2026-08-25 15:25 UTCEG score recompute
  36. 2026-08-25 14:35 UTCEG score recompute
  37. 2026-08-25 13:49 UTCEPSS rescore
  38. 2026-08-24 18:43 UTCEG score recompute
  39. 2026-08-23 19:37 UTCEG score recompute
  40. 2026-08-23 00:19 UTCEPSS rescore
  41. 2026-08-21 21:25 UTCEG score recompute
  42. 2026-08-21 20:19 UTCEG score recompute▲ 6.90
  43. 2026-08-21 20:19 UTCMITRE cvelistV5CVSS v3 → 6.9 · CVSS v4 → 6.9
  44. 2026-08-17 16:54 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45099?
CVE-2026-45099 is a medium vulnerability published on August 17, 2026. Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu or Terraform to scale. Prior to 1.0.4, Terragrunt trusts paths decoded from a downloaded module's .terragrunt-module-manifest during fileManifest.Clean() in internal/util/file.go. A malicious or…
When was CVE-2026-45099 disclosed?
CVE-2026-45099 was first published on August 17, 2026, with the most recent update on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45099 actively exploited?
CVE-2026-45099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45099?
CVE-2026-45099 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45099?
A fix for CVE-2026-45099 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-45099 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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