# CVE-2026-4243: La Nacion App app.lanacion.activity BuildConfig.java credentials storage

> Local attackers can extract API keys from the La Nacion Android app's BuildConfig file, exposing sensitive credentials.

- **Severity:** Low 2.0 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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:** 16 Mar 2026
- **Updated:** 16 Mar 2026
- **Also known as:** GHSA-3jfj-jjxx-r4gw

## What is CVE-2026-4243?

CVE-2026-4243 is a low-severity vulnerability in La Nacion App, published on 16 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A weakness has been identified in La Nacion App 10.2.25 on Android. This impacts an unknown function of the file source/app/lanacion/clublanacion/BuildConfig.java of the component app.lanacion.activity. Executing a manipulation of the argument API_KEY_WEBSOCKET_CV can lead to unprotected storage of credentials. The attack can only be executed locally. A high complexity level is associated with this attack. The exploitability is said to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-256 (Plaintext Storage of a Password), CWE-255

## Which versions are affected by CVE-2026-4243?


## How do I fix CVE-2026-4243?

No fix has been published for CVE-2026-4243 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4243 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4243 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4243 and fix it if it is affected.

What it is: CVE-2026-4243 is a low-severity vulnerability in La Nacion App, published on 16 Mar 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-2026-4243 exists.

Affected product: La Nacion 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-2026-4243/ (Markdown: https://insights.sbomify.com/CVE-2026-4243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4243
- OSV: https://osv.dev/vulnerability/CVE-2026-4243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4243/
Summaries are generated and may contain mistakes; the official description above is the record.