TI-2025-21660 Aliases CVE-2025-30354

Bruno ignores Safe-Mode in Asserts expressions

LOW 38CWE-942Published 2025-04-01 · Updated 2025-04-02

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Bruno is an open source IDE for exploring and testing APIs. A bug in the assertion runtime caused assert expressions to run in Developer Mode, even if Safe Mode was selected. The bug resulted in the sandbox settings to be ignored for the particular case where a single request is run/sent. This vulnerability's attack surface is limited strictly to scenarios where users import collections from untrusted or malicious sources. The exploit requires deliberate action from the user—specifically, downloading and opening an externally provided malicious Bruno collection. The vulnerability is fixed in 1.39.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00376 31st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed bruno (usebruno): 1.39.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
usebruno	bruno	before 1.39.1	1.39.1	Patch available	CNA

bruno Vendorusebruno Affected before 1.39.1 Fixed in 1.39.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:usebruno:bruno::::::::	before 1.39.1	Vulnerable	usebruno

cpe:2.3:a:usebruno:bruno:*:*:*:*:*:*:*:* Versions before 1.39.1 Vulnerable ·usebruno

Remediation

Fix · CNA bruno (usebruno) Fixed in 1.39.1

Timeline

2026-10-02 Threatist record created from CVE-2025-30354

References

Exploit 1

https://github.com/usebruno/bruno/security/advisories/GHSA-hffg-7v8v-79j3

TI-2024-32402 Bruno before 1.29.1 uses Electron shell.openExternal without validation (of http or… CVSS 3.1MEDIUM 6.5
TI-2026-27085 Axios npm Supply Chain Incident Impacting @usebruno/cli CVSS 3.1CRITICAL 9.8
TI-2025-21546 Bruno XSS On Environment Name CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences