Axios npm Supply Chain Incident Impacting @usebruno/cli

Exploitation

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

CVSS

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

EPSS

• CVE-2026-34841: 0.24% estimated exploitation activity in the next 30 days; percentile 15.25 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact This is a supply chain attack involving compromised versions of the `axios` npm package, which introduced a hidden dependency deploying a cross-platform Remote Access Trojan (RAT). Users of @usebruno/cli who ran `npm install` between 00:21 UTC and ~03:30 UTC on March 31, 2026 may have been impacted. Potential impact includes: * Execution of a malicious `postinstall` script * Remote Access Trojan (RAT) installation * Exfiltration of credentials and sensitive data Not impacted: * Bruno desktop app users * Users who installed outside the attack window

Patches The compromised `axios` versions (`1.14.1`, `0.30.4`) have been removed from npm, and new installations will now resolve to safe versions. Additionally, Bruno has taken further hardening steps: * Pinned `axios` to a known safe version to prevent accidental resolution to malicious releases * Fix implemented in:…

Published by the source

2 Apr 2026, 18:34 UTC

Last modified by the source

6 Apr 2026, 23:49 UTC

Source last checked

24 Oct 2026, 04:13 UTC

1. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-658g-p7jg-wx5g

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# Patch Next advisory brief: CVE-2026-34841

Advisory: Axios npm Supply Chain Incident Impacting @usebruno/cli
IDs: CVE-2026-34841, GHSA-658g-p7jg-wx5g
Record: https://patchnext.com/advisories/cve-2026-34841 (revision 1, source checked 24 Oct 2026, 04:13 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @usebruno/cli 3.2.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @usebruno/cli: affected < 3.2.1; fixed in 3.2.1

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

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @usebruno/cli.
- 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/GHSA-658g-p7jg-wx5g (OSV record GHSA-658g-p7jg-wx5g lists affected ranges: npm @usebruno/cli >=0 <3.2.1 (fixed))

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