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CVE-2026-8209

📛 CVE Title

CVE-2026-8209

⬇ Download JSON ⚠ View as Threat

Description

Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application.

Overview

State
PUBLISHED
Assigner (CNA)
PRJBLK
CVSS severity
MEDIUM
CVSS score
CVSS 6.9 / 10 6.9 6.9 / 10
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Effective score
6.9 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-23
Reserved
2026-05-09
Published
2026-05-09 05:19 UTC
Last updated
2026-05-11 19:45 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8209.json
Linked Threat
CVE-2026-8209 — CVE-2026-8209

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-09 04:16:28 UTC
NVD last modified
2026-05-12 15:37:48 UTC
EPSS score
0.0008 (probability of exploitation in next 30 days)
EPSS percentile
22.55% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 06:20 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-28899
Assigner
PRJBLK
Published
May 9, 2026, 3:19:27 AM
Updated
May 11, 2026, 5:45:44 PM
EUVD base score (CVSS 4.0)
6.9 / 10
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
EUVD-reported EPSS
0.0800
Vendors
GibbonEdu
Products
Gibbon (0 <30.0.01)
Gibbon (0 <30.0.01)

ENISA description: Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application.

EUVD references (2)

Affected products (1)
VendorProductVersionsPlatforms
gibbonedu gibbon 0 (affected) —

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

MITRE references (2) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (19)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-8209.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8209",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T17:45:05.296290Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-11T17:45:44.538Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "gibbon",
          "vendor": "gibbonedu",
          "versions": [
            {
              "lessThan": "30.0.01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application."
            }
          ],
          "value": "Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-126",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-126 Path Traversal"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-23",
              "description": "CWE-23 Relative path traversal",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-09T03:19:27.757Z",
        "orgId": "ab69c47f-b95e-4bf2-b2d9-4b1fd1b24b4a",
        "shortName": "PRJBLK"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/GibbonEdu/core/releases/tag/v30.0.01"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://projectblack.io/blog/gibbon-v30-authenticated-sql-injection-and-rce/#denial-of-service-via-path-traversal"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ab69c47f-b95e-4bf2-b2d9-4b1fd1b24b4a",
    "assignerShortName": "PRJBLK",
    "cveId": "CVE-2026-8209",
    "datePublished": "2026-05-09T03:19:27.757Z",
    "dateReserved": "2026-05-09T03:01:00.284Z",
    "dateUpdated": "2026-05-11T17:45:44.538Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}