Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cacti | Cacti | < 1.2.31 |
Related Weaknesses (CWE)
References
- https://github.com/Cacti/cacti/commit/136ae6ef0715e77bca69c0eb60781f5e17df0795Patch
- https://github.com/Cacti/cacti/security/advisories/GHSA-9jqv-4cpm-vm2cPatchVendor Advisory
FAQ
What is CVE-2026-39948?
CVE-2026-39948 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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_...
How severe is CVE-2026-39948?
CVE-2026-39948 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-39948?
Check the references section above for vendor advisories and patch information. Affected products include: Cacti Cacti.