CVE-2026-47078 (GCVE-0-2026-47078)
Vulnerability from cvelistv5 – Published: 2026-07-27 15:03 – Updated: 2026-09-24 20:48
VLAI
EPSS
VEX
Title
Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass
Summary
Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.
zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.
This vulnerability is associated with program file lib/stdlib/src/zip.erl.
This issue affects OTP from OTP 27.1 before OTP 27.3.4.15, OTP 28.5.0.4, and OTP 29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:38 UTC
CWE
- CWE-23 - Relative Path Traversal
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/erlang/otp/security/advisories… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-47078.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-47078 | related |
| https://www.erlang.org/doc/system/versions.html#o… | x_version-scheme |
| https://github.com/erlang/otp/commit/8d537f51a426… | related |
| https://github.com/erlang/otp/commit/8a933c9c7835… | patch |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Erlang | OTP |
Affected:
27.1 , < *
(otp)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
||
| Erlang | OTP |
Affected:
6.1 , < *
(otp)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
||
| Erlang | OTP |
Affected:
8d537f51a4262d24f3395c4148323eaca9facbbd , < 8a933c9c7835b06776d31d17b79b7336627d887a
(git)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
Date Public
2026-07-27 15:03
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47078",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-27T18:38:46.508080Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T18:38:54.420Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "otp",
"packageURL": "pkg:software-id/erlang.org/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "27.3.4.15",
"status": "unaffected"
},
{
"at": "28.5.0.4",
"status": "unaffected"
},
{
"at": "29.0.4",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "27.1",
"versionType": "otp"
}
]
},
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "stdlib",
"packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
"product": "OTP",
"programFiles": [
"src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "6.2.2.4",
"status": "unaffected"
},
{
"at": "7.3.0.1",
"status": "unaffected"
},
{
"at": "8.0.3",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "6.1",
"versionType": "otp"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "erlang/otp",
"packageURL": "pkg:github/erlang/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a",
"status": "affected",
"version": "8d537f51a4262d24f3395c4148323eaca9facbbd",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "27.3.4.15",
"versionStartIncluding": "27.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "28.5.0.4",
"versionStartIncluding": "28.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "29.0.4",
"versionStartIncluding": "29.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jonatan M\u00e4nnchen / EEF"
},
{
"lang": "en",
"type": "finder",
"value": "Zhang Delong"
},
{
"lang": "en",
"type": "remediation developer",
"value": "John H\u00f6gberg"
}
],
"datePublic": "2026-07-27T15:03:50.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eRelative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003ezip:unzip/1,2\u003c/code\u003e and \u003ccode\u003ezip:extract/1,2\u003c/code\u003e validate entry paths using \u003ccode\u003ezip:check_dir_level/2\u003c/code\u003e, which tracks directory depth as a running integer counter: \u003ccode\u003e..\u003c/code\u003e decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as \u003ccode\u003e../x/y\u003c/code\u003e causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via \u003ccode\u003eadd_cwd\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis vulnerability is associated with program file \u003ccode\u003elib/stdlib/src/zip.erl\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis issue affects OTP from OTP\u0026nbsp;27.1 before OTP\u0026nbsp;27.3.4.15, OTP\u0026nbsp;28.5.0.4, and OTP\u0026nbsp;29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\n`zip:unzip/1,2` and `zip:extract/1,2` validate entry paths using `zip:check_dir_level/2`, which tracks directory depth as a running integer counter: `..` decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as `../x/y` causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via `add_cwd`.\n\nThis vulnerability is associated with program file `lib/stdlib/src/zip.erl`.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."
}
],
"value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."
}
],
"impacts": [
{
"capecId": "CAPEC-139",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-139 Relative Path Traversal"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-23",
"description": "CWE-23 Relative Path Traversal",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-24T20:48:37.203Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"
},
{
"name": "EEF CNA record for CVE-2026-47078",
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-47078.html"
},
{
"name": "OSV record EEF-CVE-2026-47078",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078"
},
{
"name": "Erlang/OTP version ordering",
"tags": [
"x_version-scheme"
],
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"name": "Introducing commit 8d537f5 in erlang/otp",
"tags": [
"related"
],
"url": "https://github.com/erlang/otp/commit/8d537f51a4262d24f3395c4148323eaca9facbbd"
},
{
"name": "Fix commit 8a933c9 in erlang/otp",
"tags": [
"patch"
],
"url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-47078",
"datePublished": "2026-07-27T15:03:50.929Z",
"dateReserved": "2026-05-18T17:28:10.319Z",
"dateUpdated": "2026-09-24T20:48:37.203Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-47078",
"date": "2026-09-29",
"epss": "0.00192",
"percentile": "0.07931"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "otp",
"packageURL": "pkg:software-id/erlang.org/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "27.3.4.15",
"status": "unaffected"
},
{
"at": "28.5.0.4",
"status": "unaffected"
},
{
"at": "29.0.4",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "27.1",
"versionType": "otp"
}
]
},
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "stdlib",
"packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
"product": "OTP",
"programFiles": [
"src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "6.2.2.4",
"status": "unaffected"
},
{
"at": "7.3.0.1",
"status": "unaffected"
},
{
"at": "8.0.3",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "6.1",
"versionType": "otp"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "erlang/otp",
"packageURL": "pkg:github/erlang/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a",
"status": "affected",
"version": "8d537f51a4262d24f3395c4148323eaca9facbbd",
"versionType": "git"
}
]
}
],
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."
}
],
"id": "CVE-2026-47078",
"lastModified": "2026-09-24T21:17:12.687",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-47078",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-27T18:38:46.508080Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-27T16:17:07.643",
"references": [
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://cna.erlef.org/cves/CVE-2026-47078.html"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/erlang/otp/commit/8d537f51a4262d24f3395c4148323eaca9facbbd"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078"
},
{
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
}
],
"sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-23"
}
],
"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-30T14:50:07+00:00",
"cve": "CVE-2026-47078",
"id": "CVE-2026-47078",
"initial_release_date": "2026-07-27T15:03:50.929000+00:00",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "otp: Erlang OTP: Arbitrary file write via relative path traversal in zip module",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47078.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47078",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-27T18:38:46.508080Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T18:38:50.891Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "otp",
"packageURL": "pkg:software-id/erlang.org/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "27.3.4.15",
"status": "unaffected"
},
{
"at": "28.5.0.4",
"status": "unaffected"
},
{
"at": "29.0.4",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "27.1",
"versionType": "otp"
}
]
},
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "stdlib",
"packageURL": "pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
"product": "OTP",
"programFiles": [
"src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "6.2.2.4",
"status": "unaffected"
},
{
"at": "7.3.0.1",
"status": "unaffected"
},
{
"at": "8.0.3",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "6.1",
"versionType": "otp"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"zip"
],
"packageName": "erlang/otp",
"packageURL": "pkg:github/erlang/otp",
"product": "OTP",
"programFiles": [
"lib/stdlib/src/zip.erl"
],
"programRoutines": [
{
"name": "zip:unzip/1"
},
{
"name": "zip:unzip/2"
},
{
"name": "zip:extract/1"
},
{
"name": "zip:extract/2"
},
{
"name": "zip:check_dir_level/2"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"lessThan": "8a933c9c7835b06776d31d17b79b7336627d887a",
"status": "affected",
"version": "8d537f51a4262d24f3395c4148323eaca9facbbd",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "27.3.4.15",
"versionStartIncluding": "27.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "28.5.0.4",
"versionStartIncluding": "28.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "29.0.4",
"versionStartIncluding": "29.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jonatan M\u00e4nnchen / EEF"
},
{
"lang": "en",
"type": "finder",
"value": "Zhang Delong"
},
{
"lang": "en",
"type": "remediation developer",
"value": "John H\u00f6gberg"
}
],
"datePublic": "2026-07-27T15:03:50.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eRelative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003ezip:unzip/1,2\u003c/code\u003e and \u003ccode\u003ezip:extract/1,2\u003c/code\u003e validate entry paths using \u003ccode\u003ezip:check_dir_level/2\u003c/code\u003e, which tracks directory depth as a running integer counter: \u003ccode\u003e..\u003c/code\u003e decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as \u003ccode\u003e../x/y\u003c/code\u003e causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via \u003ccode\u003eadd_cwd\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis vulnerability is associated with program file \u003ccode\u003elib/stdlib/src/zip.erl\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis issue affects OTP from OTP\u0026nbsp;27.1 before OTP\u0026nbsp;27.3.4.15, OTP\u0026nbsp;28.5.0.4, and OTP\u0026nbsp;29.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\n`zip:unzip/1,2` and `zip:extract/1,2` validate entry paths using `zip:check_dir_level/2`, which tracks directory depth as a running integer counter: `..` decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as `../x/y` causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via `add_cwd`.\n\nThis vulnerability is associated with program file `lib/stdlib/src/zip.erl`.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."
}
],
"value": "Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive.\n\nzip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd.\n\nThis vulnerability is associated with program file lib/stdlib/src/zip.erl.\n\nThis issue affects OTP from OTP\u00a027.1 before OTP\u00a027.3.4.15, OTP\u00a028.5.0.4, and OTP\u00a029.0.4, corresponding to stdlib from 6.1 before 6.2.2.4, 7.3.0.1, and 8.0.3."
}
],
"impacts": [
{
"capecId": "CAPEC-139",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-139 Relative Path Traversal"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-23",
"description": "CWE-23 Relative Path Traversal",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-24T20:48:37.203Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"
},
{
"name": "EEF CNA record for CVE-2026-47078",
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-47078.html"
},
{
"name": "OSV record EEF-CVE-2026-47078",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47078"
},
{
"name": "Erlang/OTP version ordering",
"tags": [
"x_version-scheme"
],
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"name": "Introducing commit 8d537f5 in erlang/otp",
"tags": [
"related"
],
"url": "https://github.com/erlang/otp/commit/8d537f51a4262d24f3395c4148323eaca9facbbd"
},
{
"name": "Fix commit 8a933c9 in erlang/otp",
"tags": [
"patch"
],
"url": "https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Relative path traversal in zip:unzip/zip:extract via check_dir_level depth-counter bypass"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-47078",
"datePublished": "2026-07-27T15:03:50.929Z",
"dateReserved": "2026-05-18T17:28:10.319Z",
"dateUpdated": "2026-09-24T20:48:37.203Z",
"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…
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…