# CVE-2026-81867: Deserialization of Untrusted Data in Application Integration allows Remote Code Execution

> An authenticated user can execute arbitrary code on shared servers via deserialization in JavaScript Tasks, requiring a patch.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Clear`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-33v3-56q5-h52m

## What is CVE-2026-81867?

CVE-2026-81867 is a critical unsafe deserialization vulnerability in Google Cloud Application Integration, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A Deserialization of Untrusted Data vulnerability in the JavaScript Task in Google Cloud Application Integration versions prior to 2026-06-28 on Google Cloud Platform allows an authenticated user with standard permissions to run arbitrary code on the shared production servers using a specially crafted script bypassing param guards.

This vulnerability was patched on 28 June 2026, and no customer action is needed.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-81867?


## How do I fix CVE-2026-81867?

No fix has been published for CVE-2026-81867 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-81867 being exploited?

There is no known exploitation of CVE-2026-81867 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-81867 and fix it if it is affected.

What it is: CVE-2026-81867 is a critical unsafe deserialization vulnerability in Google Cloud Application Integration, published on 28 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-2026-81867 in the wild and no public exploit code.

Affected product: Google Cloud Application Integration. 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-2026-81867/ (Markdown: https://insights.sbomify.com/CVE-2026-81867/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-81867
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-81867
- OSV: https://osv.dev/vulnerability/CVE-2026-81867

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-81867/
Summaries are generated and may contain mistakes; the official description above is the record.