Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
Critical, CVSS 9.6amended

Malware in @opensearch-project/opensearch

GHSA-27f5-xjrr-q9ff

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

  • npm @opensearch-project/opensearch

    Affected
    >= 3.5.3, <= 3.5.3>= 3.6.2, <= 3.6.2>= 3.7.0, <= 3.7.0>= 3.8.0, <= 3.8.0
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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/NewYork) | |---------|----------------|------------------------------| | 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…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-27f5-xjrr-q9ff

  2. Revision 2 · amended ·

    Amended from osv record GHSA-27f5-xjrr-q9ff

  3. Revision 1 · created ·

    Published from ghsa record GHSA-27f5-xjrr-q9ff

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-27f5-xjrr-q9ff

Advisory: Malware in @opensearch-project/opensearch
IDs: GHSA-27f5-xjrr-q9ff
Record: https://patchnext.com/advisories/ghsa-27f5-xjrr-q9ff (revision 3, source checked 26 Oct 2026, 12:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @opensearch-project/opensearch: affected >= 3.5.3, <= 3.5.3; >= 3.6.2, <= 3.6.2; >= 3.7.0, <= 3.7.0; >= 3.8.0, <= 3.8.0

## Suggested inspection (read-only)
- `npm ls @opensearch-project/opensearch --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @opensearch-project/opensearch.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-27f5-xjrr-q9ff (GitHub-reviewed advisory GHSA-27f5-xjrr-q9ff lists affected ranges: npm @opensearch-project/opensearch >=3.5.3 =3.6.2 =3.7.0 =3.8.0 <=3.8.0)
- Verified: https://osv.dev/vulnerability/GHSA-27f5-xjrr-q9ff (OSV record GHSA-27f5-xjrr-q9ff lists affected ranges: npm @opensearch-project/opensearch >=3.5.3 =3.6.2 =3.7.0 =3.8.0 <=3.8.0)

Commands are suggestions: review each one before running it.

Loading voting…