Vulnerability-Lookup

GHSA-FCQJ-76G3-Q7QM

Vulnerability from github – Published: 2026-01-07 21:31 – Updated: 2026-03-19 21:06

Summary

Bio-Formats has an XML External Entity (XXE) vulnerability

Details

Bio-Formats versions up to and including 8.3.0 contain an XML External Entity (XXE) vulnerability in the Leica Microsystems metadata parsing component (e.g., XLEF). The parser uses an insecurely configured DocumentBuilderFactory when processing Leica XML-based metadata files, allowing external entity expansion and external DTD loading. A crafted metadata file can trigger outbound network requests (SSRF), access local system resources where readable, or cause a denial of service during XML parsing.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

4.6 (Medium)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "ome:pom-bio-formats"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "8.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22186"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-08T17:33:26Z",
    "nvd_published_at": "2026-01-07T21:16:02Z",
    "severity": "MODERATE"
  },
  "details": "Bio-Formats versions up to and including 8.3.0 contain an XML External Entity (XXE) vulnerability in the Leica Microsystems metadata parsing component (e.g., XLEF). The parser uses an insecurely configured DocumentBuilderFactory when processing Leica XML-based metadata files, allowing external entity expansion and external DTD loading. A crafted metadata file can trigger outbound network requests (SSRF), access local system resources where readable, or cause a denial of service during XML parsing.",
  "id": "GHSA-fcqj-76g3-q7qm",
  "modified": "2026-03-19T21:06:48Z",
  "published": "2026-01-07T21:31:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22186"
    },
    {
      "type": "WEB",
      "url": "https://docs.openmicroscopy.org/bio-formats"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ome/bioformats"
    },
    {
      "type": "WEB",
      "url": "https://seclists.org/fulldisclosure/2026/Jan/6"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Bio-Formats has an XML External Entity (XXE) vulnerability"
}

CVE-2026-22186 (GCVE-0-2026-22186)

Vulnerability from cvelistv5 – Published: 2026-01-07 20:26 – Updated: 2026-07-14 15:53

Title

Bio-Formats <= 8.3.0 XXE in Leica XLEF Metadata Parser

Summary

Severity

4.6 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-07 21:16 UTC

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://seclists.org/fulldisclosure/2026/Jan/6	technical-descriptionexploit
https://github.com/ome/bioformats/security/adviso…	vendor-advisory
https://docs.openmicroscopy.org/bio-formats/	productrelease-notes
https://www.vulncheck.com/advisories/bio-formats-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Open Microscopy Environment	Bio-Formats	Affected: 0 , ≤ 8.3.0 (semver) cpe:2.3:a:openmicroscopy:bio-formats::::::::

Credits

Ron Edgerson Beatriz Fresno Naumova

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-22186",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-07T21:16:47.850182Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-07T21:17:25.927Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Bio-Formats",
          "vendor": "Open Microscopy Environment",
          "versions": [
            {
              "lessThanOrEqual": "8.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:openmicroscopy:bio-formats:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
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          "type": "finder",
          "value": "Ron Edgerson"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Beatriz Fresno Naumova"
        }
      ],
      "descriptions": [
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          "supportingMedia": [
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            }
          ],
          "value": "Bio-Formats versions up to and including 8.3.0 contain an XML External Entity (XXE) vulnerability in the Leica Microsystems metadata parsing component (e.g., XLEF). The parser uses an insecurely configured DocumentBuilderFactory when processing Leica XML-based metadata files, allowing external entity expansion and external DTD loading. A crafted metadata file can trigger outbound network requests (SSRF), access local system resources where readable, or cause a denial of service during XML parsing."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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      "providerMetadata": {
        "dateUpdated": "2026-07-14T15:53:09.524Z",
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      "references": [
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          "tags": [
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          "url": "https://seclists.org/fulldisclosure/2026/Jan/6"
        },
        {
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          "url": "https://github.com/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjp"
        },
        {
          "tags": [
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          "url": "https://docs.openmicroscopy.org/bio-formats/"
        },
        {
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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  "cveMetadata": {
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    "datePublished": "2026-01-07T20:26:48.324Z",
    "dateReserved": "2026-01-06T16:47:17.182Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-FCQJ-76G3-Q7QM

CVE-2026-22186 (GCVE-0-2026-22186)

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