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CVE-2026-34841

Usebruno Bruno vulnerability

9.8 CRITICALEPSS 0.32%
  1. Published6 Apr 2026

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Usebruno Bruno< 3.2.1

Remediation

Fixed in
Usebruno Bruno≥ 3.2.1

References

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Frequently asked

Is CVE-2026-34841 being actively exploited?

CVE-2026-34841 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.32%.

How severe is CVE-2026-34841?

CVE-2026-34841 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2026-34841?

Affected products include Usebruno Bruno.

How do I fix CVE-2026-34841?

Upgrade affected software to a fixed version, for example Usebruno Bruno 3.2.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34841 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.