CVE-2026-77811CWE-79cross-site-scripting

CVE-2026-77811

High · published August 22, 2026

CVSS v3.1
8.7
EPSS
1%
Percentile
43.2
In the wild
Unconfirmed
What it is

Improper input validation in the dashboards-observability plugin in OpenSearch Dashboards allows a remote authenticated user with write permissions to OpenSearch Dashboards saved objects to execute arbitrary JavaScript in the context of other users' browser sessions by uploading a saved asset with arbitrary web content.

The record
Technical detail
CVSS v3.1
8.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
6.2 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
EPSS
0.00518 · 43.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-22T01:17Z
References (4)
https://aws.amazon.com/security/security-bulletins/2026-088-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/opensearch-project/dashboards-observability/security/advisories/GHSA-rmqx-r3wm-3px5 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://opensearch.org/artifacts/by-version/#release-2-19-6 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://opensearch.org/artifacts/by-version/#release-3-4-0 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 21 AUG 20:09Z
    Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards
    cvelistv5