CVE-2026-53476: Assisted Migration Agent Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-7j4w-x8x8-5mvg
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CVSS 9.6
CWE-59 CWE-22
Published
Advisory Summary

CVE-2026-53476 is a CRITICAL (CVSS 9.6) remote code execution vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Assisted Migration Agent libraries in the Go ecosystem. The issue involves path traversal in gzipped tarball handling enables arbitrary file write and remote code execution. Remediation is available by upgrading affected packages to version 0.16.0.

CVE-2026-53476 at a Glance

CVE Identifier CVE-2026-53476
GHSA Identifier GHSA-7j4w-x8x8-5mvg
Severity CRITICAL
CVSS v3.1 Base Score 9.6
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Assisted Migration Agent
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-53476

To remediate this vulnerability, upgrade all affected Assisted Migration Agent dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/kubev2v/assisted-migration-agent fixed: 0.16.0 
Upgrade github.com/kubev2v/assisted-migration-agent to 0.16.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/kubev2v/assisted-migration-agent

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-53476, inspect your project dependencies for Assisted Migration Agent:

inspect dependencies for github.com/kubev2v/assisted-migration-agent

Analyze the terminal output to locate any version of Assisted Migration Agent in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.16.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following'), where the product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. In Assisted Migration Agent, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A flaw was found in assisted-migration-agent. An unauthenticated attacker, located on the same local area network (LAN), can exploit a path traversal vulnerability. By crafting a specially designed gzipped tarball, the attacker can bypass security checks and write arbitrary files to the system. This could ultimately lead to the execution of unauthorized code on the appliance.

CVE-2026-53476 Affected Assisted Migration Agent Versions

1 component(s)
Fixed Versions:
0.16.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/kubev2v/assisted-migration-agent
golang/github.com/kubev2v/assisted-migration-agent
Go
< 0.16.0
0.16.0

References

NVD — CVE-2026-53476 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53476
Assisted Migration Agent Source Repository REPOSITORY
https://github.com/kubev2v/assisted-migration-agent/pull/256
Security Fix Commit FIX COMMIT
https://github.com/kubev2v/assisted-migration-agent/commit/bcae0438ad8386321a300413d71c982a11b7b5b7
Assisted Migration Agent Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-53476
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2487233
Assisted Migration Agent Source Repository REPOSITORY
https://github.com/kubev2v/assisted-migration-agent

Frequently Asked Questions

What is CVE-2026-53476?
CVE-2026-53476 is a security vulnerability in Assisted Migration Agent involving Path traversal in gzipped tarball handling enables arbitrary file write and remote code execution under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Assisted Migration Agent versions are affected?
Affected versions include releases prior to 0.16.0 across affected packages: github.com/kubev2v/assisted-migration-agent.
What version fixes CVE-2026-53476?
Upgrading to 0.16.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/kubev2v/assisted-migration-agent affected?
Yes, github.com/kubev2v/assisted-migration-agent is affected in releases prior to 0.16.0. Upgrade your dependency to 0.16.0 or later.
What is the CVSS score of CVE-2026-53476?
CVE-2026-53476 has a CVSS v3.1 base score of 9.6 (CRITICAL) with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-53476?
CVE-2026-53476 is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.).
How can I check Go dependencies for CVE-2026-53476?
Run the dependency tree command: 'inspect dependencies for github.com/kubev2v/assisted-migration-agent'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7j4w-x8x8-5mvg",
  "modified" : "2026-08-14T19:21:11Z",
  "published" : "2026-06-10T15:31:33Z",
  "aliases" : [ "CVE-2026-53476" ],
  "summary" : "Assisted Migration Agent: Path traversal in gzipped tarball handling enables arbitrary file write and remote code execution",
  "details" : "A flaw was found in assisted-migration-agent. An unauthenticated attacker, located on the same local area network (LAN), can exploit a path traversal vulnerability. By crafting a specially designed gzipped tarball, the attacker can bypass security checks and write arbitrary files to the system. This could ultimately lead to the execution of unauthorized code on the appliance.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kubev2v/assisted-migration-agent"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.16.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-53476"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubev2v/assisted-migration-agent/pull/256"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubev2v/assisted-migration-agent/commit/bcae0438ad8386321a300413d71c982a11b7b5b7"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-53476"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2487233"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kubev2v/assisted-migration-agent"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-59" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-14T19:21:11Z",
    "nvd_published_at" : "2026-06-10T15:16:42Z"
  }
}