Vulnerability-Lookup

GHSA-J893-VCPR-RGFC

Vulnerability from github – Published: 2026-06-09 09:32 – Updated: 2026-06-09 09:32

Details

Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate.

Severity

5.6 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-6899"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-299"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-09T09:16:30Z",
    "severity": "MODERATE"
  },
  "details": "Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate.",
  "id": "GHSA-j893-vcpr-rgfc",
  "modified": "2026-06-09T09:32:07Z",
  "published": "2026-06-09T09:32:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6899"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC/-/work_items/1739"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-6899 (GCVE-0-2026-6899)

Vulnerability from cvelistv5 – Published: 2026-06-09 08:39 – Updated: 2026-06-09 14:25

Title

Improper Check for Certificate Revocation in S2OPC

Summary

Severity

5.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-299 - Improper Check for Certificate Revocation

Assigner

GitLab

References

1 reference

URL	Tags
https://gitlab.com/systerel/S2OPC/-/work_items/1739

Impacted products

1 product

Vendor	Product	Version
Systerel	S2OPC	Affected: 1.5.0 , < 1.7.3 (semver)

Credits

Systerel

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6899",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T14:25:36.868407Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T14:25:59.888Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "S2OPC",
          "vendor": "Systerel",
          "versions": [
            {
              "lessThan": "1.7.3",
              "status": "affected",
              "version": "1.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Systerel"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-299",
              "description": "CWE-299: Improper Check for Certificate Revocation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-09T08:39:00.495Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
      },
      "references": [
        {
          "url": "https://gitlab.com/systerel/S2OPC/-/work_items/1739"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Use MbedTLS cryptographic wrapper, or upgrade S2OPC to commit 3ff81301d95a77260e9deb791585a620c5623028 or release version \u003e 1.7.2"
        }
      ],
      "title": "Improper Check for Certificate Revocation in S2OPC"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
    "assignerShortName": "GitLab",
    "cveId": "CVE-2026-6899",
    "datePublished": "2026-06-09T08:39:00.495Z",
    "dateReserved": "2026-04-23T07:01:03.918Z",
    "dateUpdated": "2026-06-09T14:25:59.888Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-J893-VCPR-RGFC

CVE-2026-6899 (GCVE-0-2026-6899)

Tags

Sightings

Nomenclature