CVE-2026-39938

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
35.3%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jul 12, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Unauthenticated LFI via graph_theme and rrdtool IPC serialization hardening · Advisory · Cacti/cacti · GitHub

https://github.com/Cacti/cacti/security/advisories/GHSA-rm7p-qcqm-x5m6
github_commit Patch Available

commit 9871f0cef9af (Cacti/cacti)

Patch available: Cacti/cacti release/1.2.31 (contains commit 9871f0cef9af)

https://github.com/Cacti/cacti/commit/9871f0cef9af285398d558c9b3188d5977e01a04

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 148× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-07-16 00:19 UTCEG score recompute
  2. 2026-07-15 20:12 UTCEG score recompute
  3. 2026-07-15 16:57 UTCEPSS rescore
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  75. 2026-07-01 18:49 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-39938?
CVE-2026-39938 is a critical vulnerability published on June 24, 2026. Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.
When was CVE-2026-39938 disclosed?
CVE-2026-39938 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39938 actively exploited?
CVE-2026-39938 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39938?
CVE-2026-39938 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-39938?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39938, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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