# CVE-2026-34849: Use after free in HarmonyOS

> A use-after-free flaw in HarmonyOS screen management allows attackers to cause a denial of service.

- **Severity:** Low 2.5 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Apr 2026
- **Updated:** 13 Apr 2026
- **Also known as:** GHSA-492w-gvc9-2cw8

## What is CVE-2026-34849?

CVE-2026-34849 is a low-severity use after free vulnerability in Huawei Harmonyos, published on 13 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

UAF vulnerability in the screen management module.
Impact: Successful exploitation of this vulnerability may affect availability.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2026-34849?

It affects 1 product.


Products: Huawei Harmonyos.

## How do I fix CVE-2026-34849?

No fix has been published for CVE-2026-34849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34849 being exploited?

There is no known exploitation of CVE-2026-34849 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Harmonyos

- [CVE-2026-34865](https://insights.sbomify.com/CVE-2026-34865/): Memory corruption in HarmonyOS (critical 10.0)
- [CVE-2023-34157](https://insights.sbomify.com/CVE-2023-34157/): Other in HarmonyOS (critical 10.0)
- [CVE-2023-41294](https://insights.sbomify.com/CVE-2023-41294/): Denial of service in HarmonyOS (critical 9.8)
- [CVE-2022-48478](https://insights.sbomify.com/CVE-2022-48478/): Denial of service in HarmonyOS (critical 9.8)
- [CVE-2022-48479](https://insights.sbomify.com/CVE-2022-48479/): Memory corruption in HarmonyOS (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34849 and fix it if it is affected.

What it is: CVE-2026-34849 is a low-severity use after free vulnerability in Huawei Harmonyos, published on 13 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-34849 in the wild and no public exploit code.

Affected product: Huawei Harmonyos. 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-2026-34849/ (Markdown: https://insights.sbomify.com/CVE-2026-34849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34849
- OSV: https://osv.dev/vulnerability/CVE-2026-34849

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34849/
Summaries are generated and may contain mistakes; the official description above is the record.