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5.5

hashicorp/go-slug may leak sensitive files in uploads

CVE-2026-14978 · published 2 months ago
Summary

Versions 0.4.0 through 0.18.2 of the go-slug component used by Terraform can be tricked by a local user to ignore the .terraformignore file and include private files when a slug is uploaded. This happens because the software does not correctly handle certain Unicode characters when checking file paths. Upgrade to a newer version of go-slug or apply the vendor's recommended patch to restore proper file filtering.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
hashicorp go-slug <= 0.18.2
>= 0.4.0, < 0.18.3
Original advisory text
HashiCorp go-slug 0.4.0 through 0.18.2 could allow a local attacker to bypass .terraformignore exclusions and cause sensitive files to be included in Terraform slug uploads due to improper handling...
HashiCorp go-slug 0.4.0 through 0.18.2 could allow a local attacker to bypass .terraformignore exclusions and cause sensitive files to be included in Terraform slug uploads due to improper handling of Unicode normalization during path matching.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-176Improper Handling of Unicode Encoding
Timeline
Published19 Aug 2026
Updated26 Oct 2026
First seen19 Aug 2026
Sources
CVE-2026-14978 · NVD
CVE-2026-14978 · MITRE
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