CVE-2026-40084

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% 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
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: 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 are vulnerable to Path Traversal through the Report format_file Parameter, causing arbitrary file read. This vulnerability occurs in two stages. In the first stage (stored injection), lib/html_reports.php at line 283 stores $save['format_file'] = $post['format_file'] directly into the database without any validation. In the second stage (file read), lib/reports.php at line 667 concatenates CACTI_PATH_FORMATS . '/' . $format_file, and line 670 then calls file($format_file), reading arbitrary files from the filesystem. This issue has been fixed in version 1.2.31.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
24.5%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 29, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Arbitrary File Read via Path Traversal in Report `format_file` Parameter · Advisory · Cacti/cacti · GitHub

https://github.com/Cacti/cacti/security/advisories/GHSA-mjvw-mhj5-9jcj
github_commit Patch Available

commit 4c09efaebf3a (Cacti/cacti)

Patch available: Cacti/cacti release/1.2.31 (contains commit 4c09efaebf3a)

https://github.com/Cacti/cacti/commit/4c09efaebf3a9faec66969d0b5c4aceaf397f37f

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 46× 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.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 13:46 UTCEG score recompute
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-14 15:03 UTCEG score recompute
  6. 2026-07-13 22:30 UTCEPSS rescore
  7. 2026-07-13 16:42 UTCEG score recompute
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-12 18:20 UTCEG score recompute
  11. 2026-07-12 05:46 UTCEPSS rescore
  12. 2026-07-11 19:56 UTCEG score recompute
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-10 21:36 UTCEG score recompute
  15. 2026-07-09 23:15 UTCEG score recompute
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 00:53 UTCEG score recompute
  18. 2026-07-08 15:15 UTCEPSS rescore
  19. 2026-07-08 02:26 UTCEG score recompute
  20. 2026-07-07 13:46 UTCEPSS rescore
  21. 2026-07-07 04:06 UTCEG score recompute
  22. 2026-07-06 16:27 UTCEPSS rescore
  23. 2026-07-06 16:27 UTCEPSS rescore
  24. 2026-07-06 05:45 UTCEG score recompute
  25. 2026-07-06 02:23 UTCEPSS rescore
Show 21 more
  1. 2026-07-06 02:23 UTCEPSS rescore
  2. 2026-07-05 07:24 UTCEG score recompute
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-04 09:03 UTCEG score recompute
  5. 2026-07-04 06:31 UTCEPSS rescore
  6. 2026-07-03 10:41 UTCEG score recompute
  7. 2026-07-02 12:19 UTCEG score recompute
  8. 2026-07-01 15:06 UTCEPSS rescore
  9. 2026-07-01 13:59 UTCEG score recompute
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-30 15:39 UTCEG score recompute
  12. 2026-06-29 17:18 UTCEG score recompute
  13. 2026-06-29 14:06 UTCEPSS rescore
  14. 2026-06-28 18:54 UTCEG score recompute
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-27 20:34 UTCEG score recompute
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-26 22:12 UTCEG score recompute
  20. 2026-06-25 23:51 UTCEG score recompute
  21. 2026-06-25 23:50 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40084?
CVE-2026-40084 is a medium vulnerability published on June 25, 2026. Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Path Traversal through the Report formatfile Parameter, causing arbitrary file read. This vulnerability occurs in two stages. In the first stage (stored injection), lib/htmlreports.php at…
When was CVE-2026-40084 disclosed?
CVE-2026-40084 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40084 actively exploited?
CVE-2026-40084 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40084?
CVE-2026-40084 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-40084?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40084, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-40084

Explore →

Is Your Infrastructure Affected by CVE-2026-40084?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs