# CVE-2026-13592: liftoff-sr CIPster EtherNet IP Message append out-of-bounds write

> Remote attackers can trigger an out-of-bounds write in the EtherNet IP message handler, potentially leading to code execution or denial of service.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jun 2026
- **Updated:** 1 Jul 2026
- **Also known as:** GHSA-xxw5-vgjv-jc6g

## What is CVE-2026-13592?

CVE-2026-13592 is a medium-severity memory corruption vulnerability in liftoff-sr CIPster, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was detected in liftoff-sr CIPster up to e8e9dba09bf56962807d3504b783ccdb6287f3e4. Affected by this issue is the function BufWriter::append of the component EtherNet IP Message Handler. Performing a manipulation results in out-of-bounds write. Remote exploitation of the attack is possible. The exploit is now public and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The patch is named 3a0159ed43125dcd024a1965f0289cb186bae9ff. To fix this issue, it is recommended to deploy a patch.

Weakness: CWE-787 (Out-of-bounds Write), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-13592?


## How do I fix CVE-2026-13592?

No fix has been published for CVE-2026-13592 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13592 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13592 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13592 and fix it if it is affected.

What it is: CVE-2026-13592 is a medium-severity memory corruption vulnerability in liftoff-sr CIPster, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13592 exists.

Affected product: liftoff-sr CIPster. 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-2026-13592/ (Markdown: https://insights.sbomify.com/CVE-2026-13592/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13592
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13592
- OSV: https://osv.dev/vulnerability/CVE-2026-13592

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-13592/
Summaries are generated and may contain mistakes; the official description above is the record.