CVE-2026-61788Public exploitNetwork attack vectorHinoki check available

Unauthorized database writes via read-only classifier bypass

Published Sep 24, 2026 · Updated Sep 24, 2026

Authorization bypass in Bytebase DBHub before 0.22.6 allows remote attackers to write database data through an unauthenticated MCP endpoint. The read-only classifier checks only each statement's first keyword, while connector-level controls are skipped because their configuration value is never populated. Any caller able to reach execute_sql can pass side-effecting SELECT functions; impact ranges from sequence tampering to host file access and code execution when the database role is privileged.

CVSS severity7.4
High
EPSS probability0.30%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Bytebase DBHub before 0.22.6 allows remote attackers to write database data through an unauthenticated MCP endpoint. The read-only classifier checks only each statement's first keyword, while connector-level controls are skipped because their configuration value is never populated. Any caller able to reach execute_sql can pass side-effecting SELECT functions; impact ranges from sequence tampering to host file access and code execution when the database role is privileged.

The record

CVE
CVE-2026-61788
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Bytebase
Product
DBHub
Classifications
CWE-636, CWE-184, CWE-863, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=< 0.22.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bytebase · DBHubversion=< 0.22.6

Published CVSS scores

7.4GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-636Not Failing Securely ('Failing Open')
CWE-184Incomplete List of Disallowed Inputs
CWE-863Incorrect Authorization
T1210Exploitation of Remote Services

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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