# CVE-2026-19759: Incorrect Authorization in Application Integration allows Internal Stubby RPC Execution

> Authenticated users can execute arbitrary internal RPCs with privileged identity due to incorrect authorization in task configuration.

- **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:** 28 Sep 2026
- **Also known as:** GHSA-hwqr-vwwq-mq54

## What is CVE-2026-19759?

CVE-2026-19759 is a critical missing authorization 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

An Incorrect Authorization vulnerability in the task configuration in Google Cloud Application Integration versions prior to 2026-06-17 on Google Cloud Platform allows an authenticated Google Cloud user to execute arbitrary internal RPCs from inside Google's production network under a privileged identity using an internal-only task type.

This vulnerability was patched on 17 June 2026, and no customer action is needed.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-19759?


## How do I fix CVE-2026-19759?

No fix has been published for CVE-2026-19759 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19759 being exploited?

There is no known exploitation of CVE-2026-19759 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19759 and fix it if it is affected.

What it is: CVE-2026-19759 is a critical missing authorization 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-2026-19759 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-2026-19759/ (Markdown: https://insights.sbomify.com/CVE-2026-19759/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19759
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19759
- OSV: https://osv.dev/vulnerability/CVE-2026-19759

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19759/
Summaries are generated and may contain mistakes; the official description above is the record.