# CVE-2026-56231: Capgo - Broken Object Level Authorization in Build Job Control via jobId Parameter

> Authenticated users can start or cancel arbitrary build jobs of other tenants by manipulating the jobId parameter, causing cross-tenant denial of service and unauthorized actions.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N`)
- **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:** 24 Jun 2026
- **Updated:** 25 Jun 2026
- **Also known as:** GHSA-72j4-9qp5-hfrg

## What is CVE-2026-56231?

CVE-2026-56231 is a high-severity missing authorization vulnerability in Capgo, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Capgo before 12.128.2 contains a broken object level authorization (BOLA) vulnerability in the POST /build/start/:jobId and POST /build/cancel/:jobId endpoints. The handlers authorize the request based only on the attacker-controlled app_id supplied in the request body and never verify that the jobId in the URL belongs to that app_id (or the same tenant/org) before issuing privileged builder commands with the server-held builder API key. An authenticated user with the app.build_native permission for any app they control can start or cancel arbitrary builder jobs belonging to other tenants by supplying a victim jobId, resulting in cross-tenant build sabotage (denial of service), unauthorized compute actions, and potential billing impact.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-56231?


## How do I fix CVE-2026-56231?

No fix has been published for CVE-2026-56231 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56231 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56231 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56231 and fix it if it is affected.

What it is: CVE-2026-56231 is a high-severity missing authorization vulnerability in Capgo, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56231 exists.

Affected product: Capgo. 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-2026-56231/ (Markdown: https://insights.sbomify.com/CVE-2026-56231/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56231
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56231
- OSV: https://osv.dev/vulnerability/CVE-2026-56231

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56231/
Summaries are generated and may contain mistakes; the official description above is the record.