CVE-2025-30354: Bruno is an open source IDE for exploring and testing APIs

Q: How do I fix CVE-2025-30354?

bruno: upgrade to 1.39.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-30354 being exploited?

CVE-2025-30354 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-30354 affect?

CVE-2025-30354 affects bruno. Severity is medium (CVSS 4.3). 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 pa

Q: How urgent is CVE-2025-30354?

Priority 28/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2025-30354 is a medium-severity flaw (CVSS 4.3) affecting bruno. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 de

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-942
Published	2025-04-01
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: usebruno

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-01 15:16 UTCPublished CVE record published
2026-06-17 09:08 UTCUpdated Record last modified

usebruno bruno UPGRADE

Affected: < 1.39.1

Fixed in: 1.39.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bruno || rpm -q bruno || bruno --version

2. UPGRADE to 1.39.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bruno

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bruno

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-30354?

bruno: upgrade to 1.39.1. Exact commands for each OS are on this page.

Is CVE-2025-30354 being exploited?

CVE-2025-30354 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-30354 affect?

CVE-2025-30354 affects bruno. Severity is medium (CVSS 4.3). 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 pa

How urgent is CVE-2025-30354?

Priority 28/100. Public exploit reference

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CVE-2024-48463 MEDIUM 6.5 UPGRADE Bruno before 1.29.1 uses Electron shell.openExternal without validation (of http or https) for opening windows
CVE-2017-5589 MEDIUM 5.9 DOWNGRADE DOWNGRADE An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacker t

References

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