Vulnerability-Lookup

FKIE_CVE-2026-82078

Vulnerability from fkie_nvd - Published: 2026-08-28 16:18 - Updated: 2026-09-01 04:18

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Summary

An unsafe dynamic class loading vulnerability exists in the database connection utilities of PaperCut MF and PaperCut NG. The application instantiates database driver classes based on configurable driver names without validating against an allowlist of approved drivers. If an attacker can manipulate system configuration parameters, this enables the execution of arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process.

References

URL	Tags
eb41dac7-0af8-4f84-9f6d-0272772514f4	https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/	Patch, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/rapid7/metasploit-framework/pull/21842	Issue Tracking, Patch
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078	Patch, Third Party Advisory, US Government Resource

Impacted products

Vendor	Product	Version
papercut	papercut_mf	*
papercut	papercut_mf	*
papercut	papercut_mf	*
papercut	papercut_ng	*
papercut	papercut_ng	*
papercut	papercut_ng	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "PaperCut MF/NG",
          "vendor": "PaperCut",
          "versions": [
            {
              "lessThan": "24.1.10, 25.0.13, 26.0.5",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "eb41dac7-0af8-4f84-9f6d-0272772514f4"
    }
  ],
  "cisaActionDue": "2026-09-14",
  "cisaExploitAdd": "2026-08-31",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "PaperCut NG/MF Unsafe Reflection Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F2AF3AB4-FD10-4DE1-B906-011F45948BD0",
              "versionEndExcluding": "24.1.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8F6ED0B8-62DC-4CF9-9810-2CCB824FBCA8",
              "versionEndExcluding": "25.0.12",
              "versionStartIncluding": "25.0.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "51E91B81-E311-4BB9-A753-671F0C59E7F7",
              "versionEndExcluding": "26.0.4",
              "versionStartIncluding": "26.0.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "44FCDCDE-4126-4F4F-89FC-D44924F45C82",
              "versionEndExcluding": "24.1.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9E727ABD-0007-424D-AB07-FB7816E43792",
              "versionEndExcluding": "25.0.12",
              "versionStartIncluding": "25.0.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3938B71A-CB14-4017-A037-7D5F08DAFB13",
              "versionEndExcluding": "26.0.4",
              "versionStartIncluding": "26.0.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An unsafe dynamic class loading vulnerability exists in the database connection utilities of PaperCut MF and PaperCut NG. The application instantiates database driver classes based on configurable driver names without validating against an allowlist of approved drivers. If an attacker can manipulate system configuration parameters, this enables the execution of arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process."
    }
  ],
  "id": "CVE-2026-82078",
  "lastModified": "2026-09-01T04:18:02.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.4,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "eb41dac7-0af8-4f84-9f6d-0272772514f4",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82078",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-28T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-28T16:18:31.240",
  "references": [
    {
      "source": "eb41dac7-0af8-4f84-9f6d-0272772514f4",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/rapid7/metasploit-framework/pull/21842"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078"
    }
  ],
  "sourceIdentifier": "eb41dac7-0af8-4f84-9f6d-0272772514f4",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-470"
        }
      ],
      "source": "eb41dac7-0af8-4f84-9f6d-0272772514f4",
      "type": "Secondary"
    }
  ]
}

CVE-2026-82078 (GCVE-0-2026-82078)

Vulnerability from cvelistv5 – Published: 2026-08-28 11:45 – Updated: 2026-09-01 03:56

Title

PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector

Summary

Severity

9.4 (Critical)


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

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 00:00 UTC

CWE

CWE-470 - Use of Externally-Controlled input to select classes or code ('unsafe reflection')

Assigner

PaperCut mitre root

References

3 references

URL	Tags
https://www.papercut.com/kb/Main/security-bulleti…
https://github.com/rapid7/metasploit-framework/pu…	exploit
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
PaperCut	PaperCut MF/NG	Affected: 0 , < 24.1.10, 25.0.13, 26.0.5 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-82078",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-28T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-08-28",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078"
              },
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T03:56:10.014Z",
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          },
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            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-82078"
          }
        ],
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            "time": "2026-08-28T00:00:00.000Z",
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    "cna": {
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          "vendor": "PaperCut",
          "versions": [
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

FKIE_CVE-2026-82078

CVE-2026-82078 (GCVE-0-2026-82078)

Tags

Sightings

Nomenclature