CVE-2026-77811 json
Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards
published 2026-08-21 2 mo ago modified 2026-10-14 25 d ago also EUVD-2026-64129
- cvss
- 8.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- OpenSearch OpenSearch Dashboards dashboards-observability plugin 2.19.6, 3.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
| CNA | 4.0 | 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 |
| CNA | 4.0 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- AWS Amazon OpenSearch Service
- OpenSearch OpenSearch Dashboards dashboards-observability plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
opensearch.org
/artifacts/by-version/#release-3-4-0
patch
-
opensearch.org
/artifacts/by-version/#release-2-19-6
patch
-
aws.amazon.com
/security/security-bulletins/2026-088-aws/
vendor-advisory
-
github.com
/opensearch-project/dashboards-observability/security/advisories/GHSA-rmqx-r3wm-3px5
third-party-advisory
Sources
- CVE List CVE-2026-77811
- NVD CVE-2026-77811
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.