# CVE-2026-93996: Apache MINA SSHD: Memory exhaustion DoS via unbounded SCP command line read

> A malicious peer can cause memory exhaustion and application crash in Apache MINA SSHD by sending an unbounded SCP command line without a line terminator.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-93996, GHSA-6wm4-w8x6-4vvr, UBUNTU-CVE-2026-93996

## What is CVE-2026-93996?

CVE-2026-93996 is a medium-severity denial of service vulnerability in Apache MINA SSHD, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Uncontrolled resource consumption in component ssd-scp in Apache MINA SSHD versions up to 2.19.0 or 3.0.0-M1 to 3.0.0-M5. Apache MINA SSHD is a Java library for client-side and server-side SSH.

Component sshd-scp of Apache MINA SSHD provides a Java implementation of SCP. The SCP command protocol is line-oriented with LF-terminated lines. The protocol handler in sshd-scp did not impose any limit on the length of such protocol lines. A malicious peer just sending a junk command containing a never-ending sequence of characters but never a LF would cause the receiver to allocate memory to store this whole junk command, exhausting memory and crashing the application with an OutOfMemoryError.

Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by enforcing an upper limit on the length of SCP protocol lines.

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

## Which versions are affected by CVE-2026-93996?


## How do I fix CVE-2026-93996?

Upgrade to a fixed version.

## Is CVE-2026-93996 being exploited?

There is no known exploitation of CVE-2026-93996 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93996 and fix it if it is affected.

What it is: CVE-2026-93996 is a medium-severity denial of service vulnerability in Apache MINA SSHD, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-93996 in the wild and no public exploit code.

Affected product: Apache MINA SSHD. 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-2026-93996/ (Markdown: https://insights.sbomify.com/CVE-2026-93996/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93996
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93996
- OSV: https://osv.dev/vulnerability/CVE-2026-93996

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93996/
Summaries are generated and may contain mistakes; the official description above is the record.