How severe is CVE-2026-53476?

CVE-2026-53476 has a CVSS score of 9.6/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2026-53476?

CVE-2026-53476 affects the following packages: github.com/kubev2v/assisted-migration-agent (Go). Ecosystems affected: Go.

How do I fix CVE-2026-53476?

Update github.com/kubev2v/assisted-migration-agent to 0.16.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-53476 is resolved across your whole dependency graph.

How do I detect CVE-2026-53476 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/kubev2v/assisted-migration-agent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-53476 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2026-53476 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-53476 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was CVE-2026-53476 published, and has it been updated?

CVE-2026-53476 was published on June 10, 2026 and was last updated on August 18, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹

🐹 Go

Not in CISA KEV

CRITICAL severity

CVE-2026-53476 — assisted-migration-agent

CRITICALFix: kubev2v/assisted-migration-agent#256

CVE-2026-53476 is a critical-severity (CVSS 9.6) vulnerability in github.com/kubev2v/assisted-migration-agent. A fix is available for github.com/kubev2v/assisted-migration-agent — see the affected versions and patch details below.

Assisted Migration Agent: Path traversal in gzipped tarball handling enables arbitrary file write and remote code execution

Also known asGO-2026-6231

Published

Jun 10, 2026

Updated

Aug 18, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Aug 18, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐹github.com/kubev2v/assisted-migration-agent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/kubev2v/assisted-migration-agent`	all versions	0.16.0`go get github.com/kubev2v/assisted-migration-agent@v0.16.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/kubev2v/assisted-migration-agent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/kubev2v/assisted-migration-agent to 0.16.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-53476 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2026-53476 in your dependencies?

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