Vulnerability-Lookup

CVE-2026-59112 (GCVE-0-2026-59112)

Vulnerability from cvelistv5 – Published: 2026-08-10 13:57 – Updated: 2026-08-10 17:55

Title

Signature validation vulnerability affecting DigiDoc applications

Summary

Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.

Severity

4.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 17:55 UTC

CWE

CWE-347 - Improper verification of cryptographic signature
CWE-754 - Improper Check for Unusual or Exceptional Conditions

Assigner

ENISA

References

3 references

URL	Tags
https://github.com/open-eid/libdigidocpp/pull/690	patch
https://www.id.ee/en/article/ria-soovitab-kasutaj…	vendor-advisory
https://www.ria.ee/blogi/digidoc-rakendustes-esin…	government-resource

Impacted products

4 products

Vendor	Product	Version
Estonian Information System Authority (RIA)	libdigidocpp	Affected: 4.1.0 , < 4.2.1 (semver)
Estonian Information System Authority (RIA)	DigiDoc4	Affected: 4.7.0 , < 4.8.2 (semver)
Estonian Information System Authority (RIA)	DigiDoc	Affected: 2.7.0 , < 2.7.2 (semver)
Estonian Information System Authority (RIA)	DigiDoc	Affected: 2.8.0 , < 2.8.1 (semver)

Credits

Burak Can Kus & Aleksander Kamenik (Cybernetica)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-59112

Vulnerability from fkie_nvd - Published: 2026-08-10 14:17 - Updated: 2026-08-10 18:18

Severity

4.4 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Summary

References

	URL	Tags
	a6d3dc9e-0591-4a13-bce7-0f5b31ff6158	https://github.com/open-eid/libdigidocpp/pull/690
	a6d3dc9e-0591-4a13-bce7-0f5b31ff6158	https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/
	a6d3dc9e-0591-4a13-bce7-0f5b31ff6158	https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/open-eid/libdigidocpp/pull/690

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Android"
          ],
          "product": "DigiDoc",
          "vendor": "Estonian Information System Authority (RIA)",
          "versions": [
            {
              "lessThan": "2.7.2",
              "status": "affected",
              "version": "2.7.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "iOS"
          ],
          "product": "DigiDoc",
          "vendor": "Estonian Information System Authority (RIA)",
          "versions": [
            {
              "lessThan": "2.8.1",
              "status": "affected",
              "version": "2.8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS.\u00a0This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1."
    }
  ],
  "id": "CVE-2026-59112",
  "lastModified": "2026-08-10T18:18:47.493",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/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": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59112",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-10T17:55:03.112154Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-10T14:17:25.153",
  "references": [
    {
      "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
      "url": "https://github.com/open-eid/libdigidocpp/pull/690"
    },
    {
      "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
      "url": "https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/"
    },
    {
      "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
      "url": "https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/open-eid/libdigidocpp/pull/690"
    }
  ],
  "sourceIdentifier": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        },
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ],
      "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
      "type": "Secondary"
    }
  ]
}

GHSA-CWPH-2586-4QWC

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

Severity

4.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-59112"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T14:17:25Z",
    "severity": "MODERATE"
  },
  "details": "Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS.\u00a0This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.",
  "id": "GHSA-cwph-2586-4qwc",
  "modified": "2026-08-10T15:33:51Z",
  "published": "2026-08-10T15:33:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59112"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-eid/libdigidocpp/pull/690"
    },
    {
      "type": "WEB",
      "url": "https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng"
    },
    {
      "type": "WEB",
      "url": "https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/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",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-59112

Vulnerability from osv_ubuntu

Published

2026-08-10 14:17

Modified

2026-08-10 14:17

Summary

Details

Severity

4.4 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-59112	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-59112	REPORT
	https://github.com/open-eid/libdigidocpp/pull/690	REPORT
	https://www.id.ee/en/article/ria-soovitab-kasutaj…	REPORT
	https://www.ria.ee/blogi/digidoc-rakendustes-esin…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libdigidoc-common",
            "binary_version": "3.10.1.1208+ds1-2"
          },
          {
            "binary_name": "libdigidoc-tools",
            "binary_version": "3.10.1.1208+ds1-2"
          },
          {
            "binary_name": "libdigidoc2",
            "binary_version": "3.10.1.1208+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libdigidoc",
        "purl": "pkg:deb/ubuntu/libdigidoc@3.10.1.1208+ds1-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.0-0ubuntu4",
        "3.10.1.1208+ds1-1",
        "3.10.1.1208+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libdigidoc-common",
            "binary_version": "3.10.1.1208+ds1-2.1"
          },
          {
            "binary_name": "libdigidoc-tools",
            "binary_version": "3.10.1.1208+ds1-2.1"
          },
          {
            "binary_name": "libdigidoc2",
            "binary_version": "3.10.1.1208+ds1-2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libdigidoc",
        "purl": "pkg:deb/ubuntu/libdigidoc@3.10.1.1208+ds1-2.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.10.1.1208+ds1-2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libdigidoc-common",
            "binary_version": "3.10.4+ds1-2"
          },
          {
            "binary_name": "libdigidoc-tools",
            "binary_version": "3.10.4+ds1-2"
          },
          {
            "binary_name": "libdigidoc2",
            "binary_version": "3.10.4+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libdigidoc",
        "purl": "pkg:deb/ubuntu/libdigidoc@3.10.4+ds1-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.10.4+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libdigidoc-common",
            "binary_version": "3.10.5-4.1ubuntu2"
          },
          {
            "binary_name": "libdigidoc-tools",
            "binary_version": "3.10.5-4.1ubuntu2"
          },
          {
            "binary_name": "libdigidoc2t64",
            "binary_version": "3.10.5-4.1ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libdigidoc",
        "purl": "pkg:deb/ubuntu/libdigidoc@3.10.5-4.1ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.10.5-4",
        "3.10.5-4.1build1",
        "3.10.5-4.1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS.\u00a0This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.",
  "id": "UBUNTU-CVE-2026-59112",
  "modified": "2026-08-10T14:17:00Z",
  "published": "2026-08-10T14:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-59112"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-59112"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-eid/libdigidocpp/pull/690"
    },
    {
      "type": "REPORT",
      "url": "https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/"
    },
    {
      "type": "REPORT",
      "url": "https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-59112"
  ]
}

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

CVE-2026-59112 (GCVE-0-2026-59112)

FKIE_CVE-2026-59112

GHSA-CWPH-2586-4QWC

ubuntu-cve-2026-59112

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature