CVE-2026-19589 (GCVE-0-2026-19589)
Vulnerability from cvelistv5 – Published: 2026-08-17 20:22 – Updated: 2026-08-17 20:46
VLAI
EPSS
VEX
Title
Packer vulnerable to arbitrary file write via crafted plugin archive during installation
Summary
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.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 20:46 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)
Assigner
References
1 reference
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-19589",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-17T20:46:35.455178Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T20:46:47.743Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"product": "Packer",
"repo": "https://github.com/hashicorp/packer",
"vendor": "HashiCorp",
"versions": [
{
"lessThan": "1.16.0",
"status": "affected",
"version": "1.7.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "This issue was reported to HashiCorp by George Chen."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003ePacker 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.\u003c/p\u003e\u003cbr/\u003e"
}
],
"value": "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."
}
],
"impacts": [
{
"capecId": "CAPEC-23",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-23: File Content Injection"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T20:22:19.057Z",
"orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
"shortName": "HashiCorp"
},
"references": [
{
"url": "https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654"
}
],
"source": {
"advisory": "HCSEC-2026-29",
"discovery": "EXTERNAL"
},
"title": "Packer vulnerable to arbitrary file write via crafted plugin archive during installation"
}
},
"cveMetadata": {
"assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
"assignerShortName": "HashiCorp",
"cveId": "CVE-2026-19589",
"datePublished": "2026-08-17T20:22:19.057Z",
"dateReserved": "2026-08-12T03:40:41.141Z",
"dateUpdated": "2026-08-17T20:46:47.743Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-19589",
"date": "2026-09-18",
"epss": "0.00144",
"percentile": "0.04107"
},
"microsoft_vex": {
"current_release_date": "2026-08-20T21:59:48.000Z",
"cve": "CVE-2026-19589",
"id": "msrc_CVE-2026-19589",
"initial_release_date": "2026-08-20T21:59:48.000Z",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "Packer vulnerable to arbitrary file write via crafted plugin archive during installation",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-19589.json",
"version": "1"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"product": "Packer",
"repo": "https://github.com/hashicorp/packer",
"vendor": "HashiCorp",
"versions": [
{
"lessThan": "1.16.0",
"status": "affected",
"version": "1.7.0",
"versionType": "semver"
}
]
}
],
"source": "security@hashicorp.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"id": "CVE-2026-19589",
"lastModified": "2026-08-28T15:47:00.217",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 4.7,
"source": "security@hashicorp.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-19589",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-17T20:46:35.455178Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-17T21:16:43.593",
"references": [
{
"source": "security@hashicorp.com",
"url": "https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654"
}
],
"sourceIdentifier": "security@hashicorp.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-22"
}
],
"source": "security@hashicorp.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-19589",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-17T20:46:35.455178Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T20:46:41.194Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"product": "Packer",
"repo": "https://github.com/hashicorp/packer",
"vendor": "HashiCorp",
"versions": [
{
"lessThan": "1.16.0",
"status": "affected",
"version": "1.7.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "This issue was reported to HashiCorp by George Chen."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003ePacker 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.\u003c/p\u003e\u003cbr/\u003e"
}
],
"value": "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."
}
],
"impacts": [
{
"capecId": "CAPEC-23",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-23: File Content Injection"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T20:22:19.057Z",
"orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
"shortName": "HashiCorp"
},
"references": [
{
"url": "https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654"
}
],
"source": {
"advisory": "HCSEC-2026-29",
"discovery": "EXTERNAL"
},
"title": "Packer vulnerable to arbitrary file write via crafted plugin archive during installation"
}
},
"cveMetadata": {
"assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
"assignerShortName": "HashiCorp",
"cveId": "CVE-2026-19589",
"datePublished": "2026-08-17T20:22:19.057Z",
"dateReserved": "2026-08-12T03:40:41.141Z",
"dateUpdated": "2026-08-17T20:46:47.743Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…