CVE-2026-34865 Memory corruption in HarmonyOS

Critical 10.0 Published 13 Apr 2026 Updated 13 Apr 2026

An out-of-bounds write in the HarmonyOS WEB module allows attackers to compromise system availability and confidentiality.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-34865?

CVE-2026-34865 is a critical memory corruption vulnerability in Huawei Harmonyos, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.

Weakness: CWE-122

Which versions are affected by CVE-2026-34865?

It affects 1 product.

Products include Huawei Harmonyos.

How do I fix CVE-2026-34865?

No fix has been published for CVE-2026-34865 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-34865 being exploited?

There is no known exploitation of CVE-2026-34865 in the wild and no public exploit code.

All Huawei Harmonyos vulnerabilities

Sources

Also known as GHSA-f3fr-gvgx-x9gh.