CVE-2026-39893Network attack vector

Pre-authentication SQL injection via unsanitized rfilter concatenation

Published Jun 24, 2026 · Updated Jun 24, 2026

SQL injection in Cacti 1.2.30 and earlier allows remote attackers to read or modify database data through graph filtering. The graph_view.php code concatenates the rfilter request value directly into an SQL RLIKE clause without quoting, escaping, or an allowlist. Pre-authentication reachability requires guest graph viewing to be enabled; Cacti disables guest access by default, limiting exposure to configured installations.

CVSS severity9.8
Critical
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Cacti 1.2.30 and earlier allows remote attackers to read or modify database data through graph filtering. The graph_view.php code concatenates the rfilter request value directly into an SQL RLIKE clause without quoting, escaping, or an allowlist. Pre-authentication reachability requires guest graph viewing to be enabled; Cacti disables guest access by default, limiting exposure to configured installations.

The record

CVE
CVE-2026-39893
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Cacti Group
Product
Cacti
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=< 1.2.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Cacti Group · Cactiversion=< 1.2.31

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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.

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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-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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