Vulnerability-Lookup

CVE-2026-90782 (GCVE-0-2026-90782)

Vulnerability from cvelistv5 – Published: 2026-09-13 12:22 – Updated: 2026-09-14 17:26

Title

S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()

Summary

S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.

Severity

5.3 (Medium)


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

6 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 17:25 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

VulnCheck mitre root

References

6 references

URL	Tags
https://gitlab.com/systerel/S2OPC/-/issues/1815	issue-tracking
https://gitlab.com/systerel/S2OPC/-/commit/8848f0…	patch
https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_To…	technical-description
https://gitlab.com/systerel/S2OPC	product
https://gitlab.com/systerel/S2OPC/-/merge_requests/1862	patch
https://www.vulncheck.com/advisories/s2opc-throug…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Systerel	S2OPC	Affected: 0 , ≤ 1.7.3 (custom) Unaffected: 8848f051eed069b107ae7cb16a346d6f6386a8f5 (git)	guessed

Date Public

2026-08-16 00:00

Credits

Harsh Raj Singhania

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-90782

Vulnerability from fkie_nvd - Published: 2026-09-13 13:16 - Updated: 2026-09-14 18:20

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://gitlab.com/systerel/S2OPC
	disclosure@vulncheck.com	https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147
	disclosure@vulncheck.com	https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5
	disclosure@vulncheck.com	https://gitlab.com/systerel/S2OPC/-/issues/1815
	disclosure@vulncheck.com	https://gitlab.com/systerel/S2OPC/-/merge_requests/1862
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://gitlab.com/systerel/S2OPC/-/issues/1815

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-90782",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-14T17:25:50.166515Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-13T13:16:29.410",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gitlab.com/systerel/S2OPC"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gitlab.com/systerel/S2OPC/-/issues/1815"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://gitlab.com/systerel/S2OPC/-/merge_requests/1862"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://gitlab.com/systerel/S2OPC/-/issues/1815"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-WJ27-RFM4-9HP4

Vulnerability from github – Published: 2026-09-13 15:30 – Updated: 2026-09-13 15:30

Details

Severity

5.3 (Medium)


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

6.0 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-90782"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-13T13:16:29Z",
    "severity": "MODERATE"
  },
  "details": "S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.",
  "id": "GHSA-wj27-rfm4-9hp4",
  "modified": "2026-09-13T15:30:21Z",
  "published": "2026-09-13T15:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90782"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC/-/issues/1815"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/systerel/S2OPC/-/merge_requests/1862"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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",
      "type": "CVSS_V4"
    }
  ]
}

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-2026-90782 (GCVE-0-2026-90782)

FKIE_CVE-2026-90782

GHSA-WJ27-RFM4-9HP4

Tags

Sightings

Nomenclature