Malicious code in @azure-growth/signup-ux-components (npm)

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

not scored

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

@azure-growth/signup-ux-components 1.2.2, 1.2.3 and 2.9.9 are dependency-confusion packages that take the name of a package used internally by Microsoft's Azure signup site and not published on the npm registry; 2.9.9 carries a version number above the internal release, so resolvers that also check the public registry prefer it. Their `preinstall` script runs `node index.js`, which reads the OS username and hostname and sends them in a DNS lookup of `msrc-poc. . .dbg6vplohjpkmtolbi6g18ekofkxjzm4s.oast.fun`, an out-of-band interaction collector; `index.js` is also the package entry point, so the lookup repeats whenever the package is required. Any machine that installed one of these versions has disclosed its username and hostname to a third party. The earlier `0.0.0-stage` version is an inert placeholder and is not affected. --- _-= Per source details. Do not edit below this line.=-_

Source: amazon-inspector (e6d15071d1e0d5aba0263de2826a4fde28064184bd5b38b1294a0ad1493069ef) The…

Published by the source

27 Oct 2026, 11:09 UTC

Last modified by the source

29 Oct 2026, 13:48 UTC

Source last checked

30 Oct 2026, 06:15 UTC

1. Revision 3 · amended · 30 Oct 2026

   Amended from osv record MAL-2026-18338

2. Revision 2 · amended · 29 Oct 2026

   Amended from osv record MAL-2026-18338

3. Revision 1 · created · 28 Oct 2026

   Published from osv record MAL-2026-18338

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# Patch Next advisory brief: mal-2026-18338

Advisory: Malicious code in @azure-growth/signup-ux-components (npm)
IDs: mal-2026-18338
Record: https://patchnext.com/advisories/mal-2026-18338 (revision 3, source checked 30 Oct 2026, 06:15 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
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 @azure-growth/signup-ux-components: affected >= 1.2.2, <= 1.2.2; >= 1.2.3, <= 1.2.3; >= 2.9.9, <= 2.9.9

## Suggested inspection (read-only)
- `npm ls @azure-growth/signup-ux-components --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 @azure-growth/signup-ux-components.
- 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://osv.dev/vulnerability/MAL-2026-18338 (OSV record MAL-2026-18338 lists affected ranges: npm @azure-growth/signup-ux-components >=1.2.2 =1.2.3 <=1.2.3)
- Verified: https://osv.dev/vulnerability/MAL-2026-18338 (OSV record MAL-2026-18338 lists affected ranges: npm @azure-growth/signup-ux-components >=1.2.2 =1.2.3 =2.9.9 <=2.9.9)

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