# CVE-2026-66732: Sonic 3 A.I.R. Missing Source Address Validation in ConnectionManager

> An on-path attacker can inject packets into established sessions by forging connection identifiers, enabling message forgery and session termination.

- **Severity:** High 8.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-pcww-cvpx-6v39

## What is CVE-2026-66732?

CVE-2026-66732 is a high-severity missing authorization vulnerability in Eukaryot sonic3air, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Sonic 3 A.I.R. before commit 2492d18 contains a missing source address validation vulnerability in ConnectionManager where established connections are resolved by a two-byte local connection handle alone without verifying that the datagram source address matches the registered remote address for the connection. An on-path attacker who can observe cleartext UDP traffic can inject arbitrary packets into any established session by forging the two-byte connection identifier, enabling session termination via TerminateConnectionPacket, arbitrary channel message forgery, and forged request responses without requiring IP address spoofing.

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-66732?


## How do I fix CVE-2026-66732?

No fix has been published for CVE-2026-66732 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-66732 being exploited?

There is no known exploitation of CVE-2026-66732 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-66732 and fix it if it is affected.

What it is: CVE-2026-66732 is a high-severity missing authorization vulnerability in Eukaryot sonic3air, published on 6 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-2026-66732 in the wild and no public exploit code.

Affected product: Eukaryot sonic3air. 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-2026-66732/ (Markdown: https://insights.sbomify.com/CVE-2026-66732/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-66732
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66732
- OSV: https://osv.dev/vulnerability/CVE-2026-66732

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-66732/
Summaries are generated and may contain mistakes; the official description above is the record.