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CVE-2026-39938 is a critical vulnerability in Cacti affecting versions 1.2.30 and earlier. The issue is described as an unauthenticated local file inclusion (LFI) reachable via the graph_theme parameter. Supporting advisory context indicates an earlier mitigation based only on basename() was bypassable, and that the fix in 1.2.31 strengthened validation in cacti_validate_theme() using a filesystem allowlist. The advisory context also references rrdtool IPC serialization hardening and maps the issue to both CWE-22 and CWE-78, indicating the path traversal/LFI condition may be leveraged in a code-execution path involving graph image handling and OS command execution.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.