CVE-2023-4782: Terraform Allows Arbitrary File Write During Init Operation

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-08 · updated 2026-06-17
Weakness: CWE-22

Description

Terraform version 1.0.8 through 1.5.6 allows arbitrary file write during the `init` operation if run on maliciously crafted Terraform configuration. This vulnerability is fixed in Terraform 1.5.7.

Affected products

HashiCorp Terraform: from 1.0.8 before 1.5.7 — fixed in 1.5.7

How to fix

Upgrade to a fixed version: HashiCorp Terraform 1.5.7. Check the vendor advisory for mitigations.

References

https://discuss.hashicorp.com/t/hcsec-2023-27-terraform-allows-arbitrary-file-write-during-init-operation/58082
https://discuss.hashicorp.com/t/hcsec-2023-27-terraform-allows-arbitrary-file-write-during-init-operation/58082

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