CVE-2026-61518Public exploitNetwork attack vector

Cross-tenant SQL injection via uncast primary_id

Published Aug 19, 2026 · Updated Aug 20, 2026

SQL injection in the Remote API in ISPConfig 3 allows remote authenticated users to read, modify, or delete data via primary_id. Delete and update handlers build SQL WHERE clauses by concatenating the caller-supplied primary_id in getDeleteSQL and the update path without integer casting or placeholder binding, and the JSON handler preserves injected strings unchanged. Any remote API account with one permitted delete or update function is enough, and default SQL scanning does not block quote-free boolean payloads, enabling cross-tenant writes and blind extraction of records such as password hashes.

CVSS severity8.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SQL injection in the Remote API in ISPConfig 3 allows remote authenticated users to read, modify, or delete data via primary_id. Delete and update handlers build SQL WHERE clauses by concatenating the caller-supplied primary_id in getDeleteSQL and the update path without integer casting or placeholder binding, and the JSON handler preserves injected strings unchanged. Any remote API account with one permitted delete or update function is enough, and default SQL scanning does not block quote-free boolean payloads, enabling cross-tenant writes and blind extraction of records such as password hashes.

The record

CVE
CVE-2026-61518
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
ISPConfig
Product
ISPConfig 3
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.2.0 <=*
  2. Affected versionversion=3.3.0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ISPConfig · ISPConfig 3version=3.2.0 <=*; version=3.3.0 <=*

Published CVSS scores

8.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo