🛡️ CVE-2026-34865 — harmonyos

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-34865 is classified as CWE-122: Heap-based Buffer Overflow. A write past the end of a heap allocation corrupts allocator metadata or neighbouring objects.

Affected software

CVE-2026-34865 is recorded against 1 package.

• harmonyos

Timeline and source

Published on 13 April 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

consumer.huawei.com

Other advisories for this package

harmonyos has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-34859 (5.9 Medium, published 13 Apr 2026)
• CVE-2026-34866 (5.1 Medium, published 13 Apr 2026)
• CVE-2026-34852 (6.1 Medium, published 13 Apr 2026)
• CVE-2026-34858 (4.1 Medium, published 13 Apr 2026)
• CVE-2026-34864 (6.8 Medium, published 13 Apr 2026)
• CVE-2026-34851 (2.2 Low, published 13 Apr 2026)
• CVE-2026-34857 (4.7 Medium, published 13 Apr 2026)
• CVE-2026-34863 (6.7 Medium, published 13 Apr 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-122: Heap-based Buffer Overflow) in other software:

• CVE-2022-46290 (9.8 Critical, published 13 Jul 2026)
• CVE-2022-46289 (9.8 Critical, published 13 Jul 2026)
• CVE-2023-25668 (9.5 Critical, published 29 Jun 2026)
• CVE-2023-40889 (9.5 Critical, published 29 Jun 2026)
• CVE-2023-43688 (7.5 High, published 9 Jun 2026)
• CVE-2024-30045 (6.3 Medium, published 4 Sep 2025)
• CVE-2023-28905 (8.0 High, published 28 Jun 2025)
• CVE-2024-31580 (8.0 High, published 11 Jun 2025)

Details

Affected Packages

References