# CVE-2026-93561: Information disclosure in Red Hat Fuse 7

> A malicious Memcache server can exploit a signed/unsigned type mismatch in the Netty codec to desynchronize frames and expose one client's data to another.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2026
- **Updated:** 25 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-93561, GHSA-7p33-hhxj-4qcr, UBUNTU-CVE-2026-93561

## What is CVE-2026-93561?

CVE-2026-93561 is a medium-severity vulnerability in Red Hat Fuse 7, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads `keyLength` and `extrasLength` as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted response. This can lead to frame desynchronization and response smuggling, where one client's data may be inadvertently exposed to another client's response stream in proxy or cache environments.

Weakness: CWE-1035

## Which versions are affected by CVE-2026-93561?


## How do I fix CVE-2026-93561?

No fix has been published for CVE-2026-93561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-93561 being exploited?

There is no known exploitation of CVE-2026-93561 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93561 and fix it if it is affected.

What it is: CVE-2026-93561 is a medium-severity vulnerability in Red Hat Fuse 7, published on 18 Sep 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-2026-93561 in the wild and no public exploit code.

Affected product: Red Hat Fuse 7. 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-2026-93561/ (Markdown: https://insights.sbomify.com/CVE-2026-93561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93561
- OSV: https://osv.dev/vulnerability/CVE-2026-93561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93561/
Summaries are generated and may contain mistakes; the official description above is the record.