CVE-2026-8208Public exploitNetwork attack vector

Authenticated code execution via report archive inclusion

Published May 9, 2026 · Updated May 9, 2026

Local file inclusion in Gibbon before 30.0.01 allows remote authenticated users to execute PHP through a crafted report archive. The Page::isAddressValid check accepts an include address containing .php outside blocked path fragments, while the report importer returns a temporary ZIP path outside uploads for index.php to include. Teacher-level access is required to relocate the archive and upload a ZIP/PHP polyglot, after which inclusion runs attacker-controlled code with the web server's privileges.

CVSS severity8.9
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local file inclusion in Gibbon before 30.0.01 allows remote authenticated users to execute PHP through a crafted report archive. The Page::isAddressValid check accepts an include address containing .php outside blocked path fragments, while the report importer returns a temporary ZIP path outside uploads for index.php to include. Teacher-level access is required to relocate the archive and upload a ZIP/PHP polyglot, after which inclusion runs attacker-controlled code with the web server's privileges.

The record

CVE
CVE-2026-8208
Published
May 9, 2026
Updated
May 9, 2026
Vendor
Gibbon Foundation
Product
Gibbon
Classifications
CWE-98, CAPEC-193, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2026CVE publishedPublication date reported by the CVE source.
  2. May 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <30.0.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gibbon Foundation · Gibbonversion=0 <30.0.01

Published CVSS scores

8.9PRJBLKCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CAPEC-193PHP Remote File Inclusion
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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