# CVE-2026-64773: Denial of service in container

> Attackers can exhaust host memory via unbounded buffering in Apple's container runtime, causing denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 19 Oct 2026
- **Also known as:** GHSA-wg28-286f-56v6

## What is CVE-2026-64773?

CVE-2026-64773 is a high-severity denial of service vulnerability in Apple container, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An attacker that can reach a container's published TCP port may be able to force the host's forwarding process to buffer an unbounded amount of that client's data in memory, for as long as the backend container connection takes to complete — with no cap on how much accumulates or how long the wait can be stretched. This vulnerability is addressed in container version 1.2.0.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2026-64773?

It affects 1 product.


Products: Apple Container.

## How do I fix CVE-2026-64773?

No fix has been published for CVE-2026-64773 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-64773 being exploited?

There is no known exploitation of CVE-2026-64773 in the wild and no public exploit code.

## Other vulnerabilities in Apple container

- [CVE-2026-20613](https://insights.sbomify.com/CVE-2026-20613/): Container and Containerization archive extraction does not guard against escapes from extraction base directory. (high 7.8)
- [CVE-2026-28909](https://insights.sbomify.com/CVE-2026-28909/): Users who connect to malicious registries with hostnames matching the bypass patterns will have their registry credentials exposed in plaintext. (medium 6.5)
- [CVE-2026-64777](https://insights.sbomify.com/CVE-2026-64777/): Path traversal in container (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-64773 and fix it if it is affected.

What it is: CVE-2026-64773 is a high-severity denial of service vulnerability in Apple container, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-64773 in the wild and no public exploit code.

Affected product: Apple container. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-64773/ (Markdown: https://insights.sbomify.com/CVE-2026-64773/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-64773
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-64773
- OSV: https://osv.dev/vulnerability/CVE-2026-64773

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-64773/
Summaries are generated and may contain mistakes; the official description above is the record.