CVE-2025-68435Network attack vector

Unauthenticated data access via late middleware attachment

Published Dec 17, 2025 · Updated Dec 17, 2025

Authentication bypass in Zerobyte before 0.18.5 allows remote attackers to read or alter backup-management data through its API. app/server/index.ts attached requireAuth to each nested Hono controller after route composition, so volume, repository, backup, notification, system, and event requests skipped the middleware. Any network client able to reach the web service can invoke these protected API routes without a session, exposing configuration and operational data to reading or modification.

CVSS severity9.1
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Zerobyte before 0.18.5 allows remote attackers to read or alter backup-management data through its API. app/server/index.ts attached requireAuth to each nested Hono controller after route composition, so volume, repository, backup, notification, system, and event requests skipped the middleware. Any network client able to reach the web service can invoke these protected API routes without a session, exposing configuration and operational data to reading or modification.

The record

CVE
CVE-2025-68435
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
nicotsx
Product
Zerobyte
Classifications
CWE-305, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 2025Record 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=< 0.18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

nicotsx · Zerobyteversion=< 0.18.5

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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