CVE-2026-34841 | Bruno is an open source IDE for exploring and testing APIs. … | CVSS 9.8 CRITICAL

Description

Bruno is an open source IDE for exploring and testing APIs. Prior to 3.2.1, Bruno was affected by 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. Upgrade to 3.2.1

Metadata

CVE ID: CVE-2026-34841
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-03-30 20:52 UTC
Published: 2026-04-06 16:08 UTC
Last updated: 2026-04-08 03:55 UTC
Primary CWE: CWE-494
CWE-494: Download of Code Without Integrity Check
Vendor / Product: usebruno / bruno
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
usebruno	bruno	—	< 3.2.1

Weakness (CWE)

CWE	Source	Description
CWE-494	cna	CWE-494: Download of Code Without Integrity Check
CWE-506	cna	CWE-506: Embedded Malicious Code

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (4)

https://github.com/usebruno/bruno/security/advisories/GHSA-658g-p7jg-wx5g https://github.com/usebruno/bruno/security/advisories/GHSA-658g-p7jg-wx5g
https://github.com/axios/axios/issues/10604 https://github.com/axios/axios/issues/10604
https://github.com/usebruno/bruno/pull/7632 https://github.com/usebruno/bruno/pull/7632
https://www.aikido.dev/blog/axios-npm-compromised-maintainer-hijacked-rat https://www.aikido.dev/blog/axios-npm-compromised-maintainer-hijacked-rat