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

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.

Published: 2023-09-08 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2023-4782 is rated Low Risk (31/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-4782

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-23 0.24% 0.26% +0.02%
2 2026-06-15 0.05% 0.24% +0.19%
3 2026-03-19 0.05%

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-4782

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.3 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
1.1 4.7 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
1.8 5.9 [email protected]

Weakness enumeration for CVE-2023-4782

GitHub Security Advisory for CVE-2023-4782

GHSA-h626-pv66-hhm7 · Severity: medium · Ecosystem: go — Terraform allows arbitrary file write during the `init` operation

OS Trackers for CVE-2023-4782

vendor priority summary link
alpine high CVE-2023-4782: 1 source package rows (terraform); 1 state rows across 1 repos (3.18-community); fixed 0, open 1. https://security.alpinelinux.org/vuln/CVE-2023-4782

Affected software / configurations for CVE-2023-4782

Vendor Product Version Raw CPE
hashicorp terraform >= 1.0.8, < 1.5.7 cpe:2.3:a:hashicorp:terraform:*:*:*:*:*:-:*:*

References for CVE-2023-4782

cvelogic Threat Intelligence