CVE-2026-55518

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-55518
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55518.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55518
Aliases
Published
2026-07-17T20:51:19.056Z
Modified
2026-08-12T03:51:24.630166831Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Avo: Missing Authorization in Avo Association Attach Endpoint Allows Unauthorized Relationship Manipulation and Privilege Escalation
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-639",
        "CWE-862",
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55518.json",
    "cna_assigner": "GitHub_M",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "4.0.0.beta.1"
                },
                {
                    "fixed": "4.0.0.beta.51"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/avo-hq/avo

Affected ranges

Type
GIT
Repo
https://github.com/avo-hq/avo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
995928e586fd1788dd496bd51c4dbe4a79cb2b9c
Fixed
1a8117a1a2a5136de7dc62150f486093f55ae077
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.32.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1.1
v0.1.11
v0.1.13
v0.1.14
v0.1.15
v0.1.16
v0.1.19
v0.1.2
v0.1.20
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.3.0
v0.3.2
v0.4.0
v0.4.1
v0.4.10
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.4.9
v1.*
v1.0.0
v1.0.1
v1.0.3
v1.0.4
v1.0.5
v1.1.0
v1.1.0.pre.1
v1.10.0
v1.10.1
v1.10.2
v1.10.3
v1.11.1
v1.11.2
v1.11.3
v1.11.4
v1.11.5
v1.11.6
v1.12.0
v1.12.1
v1.12.2
v1.12.3
v1.12.4
v1.13.0
v1.13.3
v1.14.0
v1.15.0
v1.16.0
v1.16.1
v1.16.2
v1.16.3
v1.16.4
v1.17.0
v1.17.1
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.2.0
v1.2.1
v1.2.10
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.2.7
v1.2.8
v1.2.9
v1.20.0
v1.20.1
v1.21.0
v1.22.0
v1.22.1
v1.22.2
v1.22.3
v1.22.4
v1.23.0
v1.24.0
v1.24.1
v1.24.2
v1.25.0
v1.3.0
v1.3.1
v1.3.3
v1.3.4
v1.3.5
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.6.0
v1.6.1
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.8.0
v1.8.1
v1.8.2
v1.8.4
v1.9.0
v1.9.1
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.10.0
v2.10.1
v2.10.2
v2.11.0
v2.12.0
v2.13.0
v2.13.1
v2.14.0
v2.14.1
v2.14.2
v2.15.0
v2.15.1
v2.15.2
v2.15.3
v2.16.0
v2.17.0
v2.18.0
v2.19.0
v2.2.0
v2.2.1
v2.2.2
v2.20.0
v2.21.0
v2.22.0
v2.23.0
v2.23.1
v2.23.2
v2.24.0
v2.24.1
v2.25.0
v2.26.0
v2.27.0
v2.27.1
v2.28.0
v2.29.0
v2.29.1
v2.3.0
v2.30.0
v2.30.1
v2.30.2
v2.31.0
v2.32.0
v2.32.1
v2.32.2
v2.32.3
v2.32.4
v2.32.5
v2.32.6
v2.33.0
v2.33.1
v2.33.2
v2.33.3
v2.34.0
v2.34.1
v2.34.2
v2.34.3
v2.34.4
v2.34.5
v2.34.6
v2.35.0
v2.36.0
v2.36.1
v2.36.2
v2.36.3
v2.37.0
v2.37.1
v2.37.2
v2.38.0
v2.39.0
v2.4.0
v2.4.1
v2.40.0
v2.41.0
v2.42.0
v2.42.1
v2.42.2
v2.43.0
v2.44.0
v2.5.0
v2.5.1
v2.6.0
v2.7.0
v2.8.0
v2.9.0
v3.*
v3.0.2
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.8
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.10.0
v3.10.1
v3.10.10
v3.10.2
v3.10.3
v3.10.4
v3.10.5
v3.10.6
v3.10.7
v3.10.8
v3.10.9
v3.11.0
v3.11.1
v3.11.10
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.13.0
v3.13.1
v3.13.2
v3.13.3
v3.13.4
v3.13.5
v3.13.6
v3.13.7
v3.14.0
v3.14.1
v3.14.2
v3.14.3
v3.14.4
v3.14.5
v3.15.0
v3.15.1
v3.15.2
v3.15.3
v3.15.4
v3.15.5
v3.15.6
v3.15.7
v3.16.0
v3.16.1
v3.16.2
v3.16.3
v3.16.4
v3.16.5
v3.16.6
v3.16.7
v3.17.0
v3.17.1
v3.17.2
v3.17.3
v3.17.4
v3.17.5
v3.17.6
v3.17.7
v3.17.8
v3.17.9
v3.18.0
v3.18.2
v3.19.0
v3.19.1
v3.19.2
v3.19.3
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.20.0
v3.20.1
v3.20.2
v3.20.3
v3.21.0
v3.22.0
v3.22.1
v3.22.2
v3.22.3
v3.22.4
v3.22.5
v3.23.0
v3.23.1
v3.24.0
v3.24.1
v3.25.0
v3.25.1
v3.25.2
v3.25.3
v3.26.0
v3.26.1
v3.26.2
v3.26.3
v3.26.4
v3.27.0
v3.28.0
v3.29.0
v3.29.1
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.3.4
v3.3.5
v3.3.6
v3.30.0
v3.30.1
v3.30.2
v3.30.3
v3.30.4
v3.31.0
v3.31.1
v3.31.2
v3.32.0
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.4.4
v3.6.2
v3.6.3
v3.6.4
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4
v3.8.0
v3.8.1
v3.8.2
v3.9.1
v3.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55518.json"