# CVE-2026-12189: Moovit Bus & Public Transit App com.tranzmate improper authorization in handler for custom url scheme

> Local attackers can bypass authorization checks in the custom URL scheme handler of the Moovit Android app to perform unauthorized actions.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jun 2026
- **Updated:** 15 Jun 2026
- **Also known as:** GHSA-g5v4-4fxp-3rxp

## What is CVE-2026-12189?

CVE-2026-12189 is a medium-severity missing authorization vulnerability in Moovit Bus & Public Transit App, published on 14 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw has been found in Moovit Bus & Public Transit App 1.18 on Android. This affects an unknown part of the component com.tranzmate. Executing a manipulation can lead to improper authorization in handler for custom url scheme. The attack can only be executed locally. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-939 (Improper Authorization in Handler for Custom URL Scheme), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-12189?


## How do I fix CVE-2026-12189?

No fix has been published for CVE-2026-12189 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12189 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12189 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12189 and fix it if it is affected.

What it is: CVE-2026-12189 is a medium-severity missing authorization vulnerability in Moovit Bus & Public Transit App, published on 14 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12189 exists.

Affected product: Moovit Bus & Public Transit App. 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-2026-12189/ (Markdown: https://insights.sbomify.com/CVE-2026-12189/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12189
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12189
- OSV: https://osv.dev/vulnerability/CVE-2026-12189

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-12189/
Summaries are generated and may contain mistakes; the official description above is the record.