web_webview has an out-of-bounds write vulnerability

published 2026-05-19 5 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-30829

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

in OpenHarmony v6.0 and prior versions allow a remote attacker arbitrary code execution in pre-installed apps.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 5 mo ago (2026-05-19)

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

OpenHarmony OpenHarmony

Classification

Weakness

CWE-787 Out-of-bounds Write

References

gitcode.com /openharmony/security/tree/master/zh/security-disclosure/2026/2026-04.md

Sources

CVE List CVE-2026-27648
NVD CVE-2026-27648

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary