CVE-2026-87927

HIGHPre-NVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: Elevated riskExposed: 0

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

MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
68(Attend)
EG Risk 68/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 9, 2026

Advisory Details (5)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher | Advisories | VulnCheck

https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-local-file-inclusion-via-ajax-dispatcher
generic

cms/application/views/require-maxsite.php at 2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c · maxsite/cms · GitHub

https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/require-maxsite.php#L13-L29
generic

cms/application/views/ajax.php at 2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c · maxsite/cms · GitHub

https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/views/ajax.php#L17-L42
generic

maxsite-cve1/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md at main · EviL0rd/maxsite-cve1 · GitHub

https://github.com/EviL0rd/maxsite-cve1/blob/main/2026.09.08-maxsite-cms-ajax-lfi-path-traversal.md
generic

GitHub - maxsite/cms: MaxSite CMS. Free CMS for your website. Smart alternative to WordPress · GitHub

https://github.com/maxsite/cms

Vendor Advisories for CVE-2026-87927(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× 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. 2026-09-20 09:59 UTCGHSA enrichment
  2. 2026-09-19 21:55 UTCEG score recompute
  3. 2026-09-19 21:55 UTCGHSA enrichment
  4. 2026-09-19 09:50 UTCGHSA enrichment
  5. 2026-09-18 21:46 UTCEG score recompute
  6. 2026-09-18 21:46 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 09:43 UTCGHSA enrichment
  9. 2026-09-17 21:39 UTCEG score recompute
  10. 2026-09-17 21:39 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-17 09:35 UTCGHSA enrichment
  13. 2026-09-16 21:31 UTCEG score recompute
  14. 2026-09-16 21:31 UTCGHSA enrichment
  15. 2026-09-16 14:09 UTCEPSS rescore
  16. 2026-09-16 09:27 UTCEG score recompute
  17. 2026-09-16 09:27 UTCGHSA enrichment
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-15 21:23 UTCGHSA enrichment
  20. 2026-09-15 09:19 UTCEG score recompute
  21. 2026-09-15 09:19 UTCGHSA enrichment
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-14 21:15 UTCGHSA enrichment
  24. 2026-09-14 09:11 UTCGHSA enrichment
  25. 2026-09-13 21:07 UTCEG score recompute
Show 21 more
  1. 2026-09-13 21:07 UTCGHSA enrichment
  2. 2026-09-13 16:48 UTCEPSS rescore
  3. 2026-09-13 09:02 UTCGHSA enrichment
  4. 2026-09-12 20:59 UTCEG score recompute
  5. 2026-09-12 20:59 UTCGHSA enrichment
  6. 2026-09-12 15:02 UTCEPSS rescore
  7. 2026-09-12 08:55 UTCGHSA enrichment
  8. 2026-09-11 20:50 UTCEG score recompute
  9. 2026-09-11 20:50 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 08:46 UTCGHSA enrichment
  13. 2026-09-10 20:42 UTCGHSA enrichment
  14. 2026-09-10 08:38 UTCGHSA enrichment
  15. 2026-09-09 20:32 UTCGHSA enrichment
  16. 2026-09-09 19:29 UTCEG score recompute
  17. 2026-09-09 19:29 UTCGHSA enrichment
  18. 2026-09-09 18:21 UTCEG score recompute
  19. 2026-09-09 17:28 UTCEG score recompute
  20. 2026-09-09 16:55 UTCEG score recompute
  21. 2026-09-09 16:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87927?
CVE-2026-87927 is a high vulnerability published on September 9, 2026. MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute…
When was CVE-2026-87927 disclosed?
CVE-2026-87927 was first published in the National Vulnerability Database on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87927 actively exploited?
CVE-2026-87927 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.8% of all scored CVEs.
What is the CVSS score of CVE-2026-87927?
CVE-2026-87927 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-87927?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87927, 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

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