CVE-2026-85665Public exploitNetwork attack vector

Arbitrary file read via unconfined body path

Published Sep 4, 2026 · Updated Sep 5, 2026

Path traversal in Bruno through 4.1.0 allows remote attackers to read local files when a crafted collection request is run. The request preparer joins an untrusted body:file value to the collection directory without checking confinement, then reads the resolved path into the HTTP body. Execution of an attacker-supplied collection is required, and readable host files are sent to its attacker-controlled endpoint.

CVSS severity7.1
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Bruno through 4.1.0 allows remote attackers to read local files when a crafted collection request is run. The request preparer joins an untrusted body:file value to the collection directory without checking confinement, then reads the resolved path into the HTTP body. Execution of an attacker-supplied collection is required, and readable host files are sent to its attacker-controlled endpoint.

The record

CVE
CVE-2026-85665
Published
Sep 4, 2026
Updated
Sep 5, 2026
Vendor
Bruno
Product
Bruno
Classifications
CWE-22, T1204.002, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bruno · Brunoversion=0 <=4.1.0

Published CVSS scores

7.1VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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