Malware in @opensearch-project/opensearch

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

## 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/security/advisories/GHSA-g7cv-rxg3-hmpx) https://github.com/TanStack/router/issues/7383

Source published

19 May 2026 14:35:05 UTC

Source modified

10 Sep 2026 03:50:45 UTC

Saved here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Publisher rating · CRITICAL