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CVE-2026-39948

Cacti SQL injection

9.8 CRITICALEPSS 0.85%
  1. Published24 Jun 2026

Description

Cacti is an open source performance and fault management framework. In versions 1.2.30 and prior, the rfilter request parameter is retrieved via the raw accessor grv() (rather than gfrv() with FILTER_VALIDATE_IS_REGEX validation) and concatenated directly into RLIKE SQL clauses in lib/html_graph.php and lib/html_tree.php, which are reachable pre-authentication through graph_view.php on installations with guest graph viewing enabled. Because the unbalanced-quote payload bypasses the regex validation that would otherwise reject it, an unauthenticated attacker can inject arbitrary SQL to compromise the confidentiality, integrity, and availability of the database. This advisory is similar to GHSA-69gg-mjfm-jjpc. This issue has been fixed in version 1.2.31.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Cacti< 1.2.31

Remediation

Fixed in
Cacti≥ 1.2.31

References

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Frequently asked

Is CVE-2026-39948 being actively exploited?

CVE-2026-39948 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.85%.

How severe is CVE-2026-39948?

CVE-2026-39948 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.85% probability of exploitation.

Which products are affected by CVE-2026-39948?

Affected products include Cacti.

How do I fix CVE-2026-39948?

Upgrade affected software to a fixed version, for example Cacti 1.2.31 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-39948 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.