CVE-2026-34841: @usebruno/cli Axios Npm Supply Chain Incident Vulnerability
CRITICALCVE-2026-34841 is a CRITICAL (CVSS 9.8) axios npm supply chain incident vulnerability (CWE-494: Download of Code Without Integrity Check) affecting @usebruno/cli libraries in the npm ecosystem. The issue involves axios npm supply chain incident impacting @usebruno/cli. Remediation is available by upgrading affected packages to version 3.2.1.
CVE-2026-34841 at a Glance
Security Impact
CVSS: 9.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-34841
To remediate this vulnerability, upgrade all affected @usebruno/cli dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @usebruno/cli@3.2.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @usebruno/cliHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-34841, inspect your project dependencies using npm:
npm ls @usebruno/cliAnalyze the terminal output to locate any version of @usebruno/cli in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2.1), your application is affected.
Note: The npm ls @usebruno/cli command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-494: Download of Code Without Integrity Check, where the product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code. In @usebruno/cli, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-34841 Affected @usebruno/cli Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@usebruno/cli
|
npm |
< 3.2.1
|
3.2.1
|
References
Frequently Asked Questions
What is CVE-2026-34841?
Which @usebruno/cli versions are affected?
What version fixes CVE-2026-34841?
Is @usebruno/cli affected?
What is the CVSS score of CVE-2026-34841?
What CWE is associated with CVE-2026-34841?
How can I check npm dependencies for CVE-2026-34841?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-658g-p7jg-wx5g",
"modified" : "2026-04-06T23:41:01Z",
"published" : "2026-04-02T18:34:04Z",
"aliases" : [ "CVE-2026-34841" ],
"summary" : "Axios npm Supply Chain Incident Impacting @usebruno/cli",
"details" : "### **Impact**\n\nThis 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).\n\nUsers of **@usebruno/cli** who ran `npm install` between **00:21 UTC and ~03:30 UTC on March 31, 2026** may have been impacted.\n\nPotential impact includes:\n\n* Execution of a malicious `postinstall` script\n* Remote Access Trojan (RAT) installation\n* Exfiltration of credentials and sensitive data\n\n**Not impacted:**\n\n* Bruno desktop app users\n* Users who installed outside the attack window\n\n\n### **Patches**\n\nThe compromised `axios` versions (`1.14.1`, `0.30.4`) have been **removed from npm**, and new installations will now resolve to safe versions.\n\nAdditionally, Bruno has taken further hardening steps:\n\n* Pinned `axios` to a known safe version to prevent accidental resolution to malicious releases\n* Fix implemented in: [https://github.com/usebruno/bruno/pull/7632](https://github.com/usebruno/bruno/pull/7632)\n\n\n### **Recommendation**\n\nIf users installed **@usebruno/cli** during the affected window:\n1. Reinstall dependencies\n2. Rotate all credentials and secrets:\n\nFor additional guidance on securing your system, refer to this article:\nhttps://www.aikido.dev/blog/axios-npm-compromised-maintainer-hijacked-rat",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@usebruno/cli"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "3.2.1"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "< 3.2.0"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/usebruno/bruno/security/advisories/GHSA-658g-p7jg-wx5g"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34841"
}, {
"type" : "WEB",
"url" : "https://github.com/axios/axios/issues/10604"
}, {
"type" : "WEB",
"url" : "https://github.com/usebruno/bruno/pull/7632"
}, {
"type" : "ADVISORY",
"url" : "https://github.com/advisories/GHSA-fw8c-xr5c-95f9"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/usebruno/bruno"
}, {
"type" : "WEB",
"url" : "https://www.aikido.dev/blog/axios-npm-compromised-maintainer-hijacked-rat"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1395", "CWE-494", "CWE-506" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2026-04-02T18:34:04Z",
"nvd_published_at" : "2026-04-06T17:17:10Z"
}
}