Malware in @opensearch-project/opensearch
Overview
The OpenSearch Project has sustained a security incident involving an external actor gaining force-push permissions within the project's CI infrastructure to embed malicious packages into four release versions of @opensearch-project/opensearch. Users are instructed to immediately take actions recommended in the Remediation section of this advisory.
Affected Versions
Package: @opensearch-project/opensearch
| Version | Published (UTC) | Published (America/New_York) |
|---|---|---|
| 3.5.3 | 2026-05-12T00:47:39Z | May 11, 2026, 8:47:39 PM EDT |
| 3.6.2 | 2026-05-12T00:29:34Z | May 11, 2026, 8:29:34 PM EDT |
| 3.7.0 | 2026-05-12T00:42:29Z | May 11, 2026, 8:42:29 PM EDT |
| 3.8.0 | 2026-05-12T00:43:54Z | May 11, 2026, 8:43:54 PM EDT |
Remediation
Any computer that has these package versions installed or updated between 00:00 UTC 12 May 2026 (8:00 PM EDT 11 May 2026) and 10:00 UTC 12 May 2026 (6:00 AM EDT 12 May 2026) should be considered fully compromised. Steps should immediately be taken to prevent further compromise.
- All secrets and keys stored on that computer should be rotated immediately from an alternate system.
- The affected packages should be removed immediately, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
References
GHSA-g7cv-rxg3-hmpx https://github.com/TanStack/router/issues/7383
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @opensearch-project/opensearch | = 3.5.3, = 3.6.2, = 3.7.0, = 3.8.0 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-506- Platform
- npm
- Package
@opensearch-project/opensearch- Disclosed
- 19.05.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-27f5-xjrr-q9ff - CC BY 4.0
Vulnerability history: @opensearch-project/opensearch
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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