Packer vulnerable to arbitrary file write via crafted plugin archive during installation
Summary
| CVE | CVE-2026-19589 |
|---|---|
| State | PUBLISHED |
| Assigner | HashiCorp |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-17 21:16:43 UTC |
| Updated | 2026-08-17 21:16:43 UTC |
| Description | Packer up to 1.15.4 is vulnerable to an issue in the third-party plugin installer that may allow unintended file system modification and could lead to code execution. A user who installs a plugin from a malicious or compromised source may be affected. This vulnerability (CVE-2026-19589) is fixed in Packer 1.16.0. |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
EPSS: 0.001440000 probability, percentile 0.042260000 (date 2026-08-18)
Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N |
| 3.1 | CNA | CVSS | 7.1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
ChangedConfidentiality
LowIntegrity
HighAvailability
NoneCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via... | [email protected] | discuss.hashicorp.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: This issue was reported to HashiCorp by George Chen. (en)
There are currently no legacy QID mappings associated with this CVE.