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vuln-cve/data/2026/55xxx/CVE-2026-55518.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-55518",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-06-16T22:44:22.284Z",
"datePublished": "2026-07-17T20:51:19.056Z",
"dateUpdated": "2026-07-20T15:20:34.406Z"
},
"containers": {
"cna": {
"title": "Avo: Missing Authorization in Avo Association Attach Endpoint Allows Unauthorized Relationship Manipulation and Privilege Escalation",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"lang": "en",
"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-862",
"lang": "en",
"description": "CWE-862: Missing Authorization",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-863",
"lang": "en",
"description": "CWE-863: Incorrect Authorization",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.6,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg"
},
{
"name": "https://github.com/avo-hq/avo/pull/4568",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/avo-hq/avo/pull/4568"
},
{
"name": "https://github.com/avo-hq/avo/commit/995928e586fd1788dd496bd51c4dbe4a79cb2b9c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/avo-hq/avo/commit/995928e586fd1788dd496bd51c4dbe4a79cb2b9c"
},
{
"name": "https://github.com/avo-hq/avo/releases/tag/v3.32.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/avo-hq/avo/releases/tag/v3.32.1"
}
],
"affected": [
{
"vendor": "avo-hq",
"product": "avo",
"versions": [
{
"version": ">= 4.0.0.beta.1, < 4.0.0.beta.51",
"status": "affected"
},
{
"version": "< 3.32.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-17T20:51:19.056Z"
},
"descriptions": [
{
"lang": "en",
"value": "Avo is a framework to create admin panels for Ruby on Rails apps. Prior to 3.32.1 and 4.0.0.beta.51, Avo's association attach workflow checks attach_<association>? in the UI and GET /resources/:resource/:id/:related/new path, but the actual write endpoint, POST /resources/:resource/:id/:related, does not run the same authorization check before mutating the association through Avo::AssociationsController#create. An authenticated low-privileged Avo user can bypass hidden or disabled attach controls and directly attach related records to a parent record by sending a crafted POST request, which can lead to privilege escalation and cross-tenant data exposure where associations represent authorization-bearing relationships. This issue is fixed in versions 3.32.1 and 4.0.0.beta.51."
}
],
"source": {
"advisory": "GHSA-8fq9-273g-6mrg",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-20T15:18:54.194227Z",
"id": "CVE-2026-55518",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-20T15:20:34.406Z"
}
}
]
}
}