Vulnerability-Lookup

GHSA-FXCQ-Q77C-FH3W

Vulnerability from github – Published: 2026-10-30 21:32 – Updated: 2026-10-30 21:32

Details

Stack-based buffer overflow and missing authorization vulnerability in Thales Sentinel Keys Server on Windows allows Overflow Buffers. Sentinel Keys Server does not check the length of the first field in the HTTP request. An attacker may craft an HTTP request and send it to Sentinel Keys Server. It may lead to remote code execution as NT AUTHORITY\SYSTEM.

This issue affects Sentinel Keys Server: versions lower than 1.3.8.0.

Severity

9.8 (Critical)


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

9.3 (Critical)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78403"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-30T20:17:17Z",
    "severity": "CRITICAL"
  },
  "details": "Stack-based buffer overflow and missing\nauthorization vulnerability in Thales Sentinel Keys Server on Windows allows\nOverflow Buffers. Sentinel Keys Server does not check the length of the first\nfield in the HTTP request. An attacker may craft an HTTP request and send it to\nSentinel Keys Server. It may lead to remote code execution as NT\nAUTHORITY\\SYSTEM.\n\n\n\n\n\nThis issue affects Sentinel Keys Server:\nversions lower than 1.3.8.0.",
  "id": "GHSA-fxcq-q77c-fh3w",
  "modified": "2026-10-30T21:32:23Z",
  "published": "2026-10-30T21:32:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78403"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.thalesgroup.com/csm?id=kb_article_view\u0026sys_kb_id=50fc9f3b3b005f10bba8b41864e45a61\u0026sysparm_article=KB0031216"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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"
    }
  ]
}

CVE-2026-78403 (GCVE-0-2026-78403)

Vulnerability from cvelistv5 – Published: 2026-10-30 19:12 – Updated: 2026-10-30 20:02

Title

Unauthenticated Stack Buffer Overflow in Sentinel Keys Server

Summary

Severity

9.3 (Critical)


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

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 19:59 UTC

CWE

CWE-121 - Stack-based buffer overflow
CWE-862 - Missing Authorization

Assigner

THA-PSIRT CNA under the THA-PSIRT root

CNA scorecard – unranked: 5 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://supportportal.thalesgroup.com/csm?id=kb_a…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Thalesgroup	Sentinel Keys Server	Affected: 0 , < 1.3.8.0 (custom) cpe:2.3:a:thalesgroup:sentinel_keys_server:::windows:::::*

Credits

Matt Hetelson (matthew.hetelson@revolutional.com)

Show details on NVD website

JSON

To clipboard

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                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T19:59:29.771309Z",
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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.

Vulnerability timeline

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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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