Vulnerability-Lookup

GHSA-VCV9-HX6W-934W

Vulnerability from github – Published: 2026-06-01 15:30 – Updated: 2026-06-01 15:30

Details

A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.

Severity

9.4 (Critical)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-8931"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-01T15:16:39Z",
    "severity": "CRITICAL"
  },
  "details": "A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.",
  "id": "GHSA-vcv9-hx6w-934w",
  "modified": "2026-06-01T15:30:43Z",
  "published": "2026-06-01T15:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8931"
    },
    {
      "type": "WEB",
      "url": "https://download.disigcdn.sk/cdn/products/websigner2/changelog.en.txt"
    },
    {
      "type": "WEB",
      "url": "https://download.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt"
    },
    {
      "type": "WEB",
      "url": "https://qesportal.sk/Portal/en/Info/News#websigner255"
    },
    {
      "type": "WEB",
      "url": "https://qesportal.sk/Portal/sk/Info/News#websigner255"
    },
    {
      "type": "WEB",
      "url": "https://www.disig.sk/en/news/important-update-of-the-web-signer-application"
    },
    {
      "type": "WEB",
      "url": "https://www.disig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-8931 (GCVE-0-2026-8931)

Vulnerability from cvelistv5 – Published: 2026-06-01 14:31 – Updated: 2026-06-01 15:31

Title

Critical RCE vulnerability in Disig Web Signer

Summary

A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.

Severity

9.4 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

SK-CERT

References

6 references

URL	Tags
https://www.disig.sk/en/news/important-update-of-…
https://www.disig.sk/sk/aktuality/dolezita-aktual…
https://download.disigcdn.sk/cdn/products/websign…
https://download.disigcdn.sk/cdn/products/websign…
https://qesportal.sk/Portal/en/Info/News#websigner255
https://qesportal.sk/Portal/sk/Info/News#websigner255

Impacted products

1 product

Vendor	Product	Version
Disig	Web Signer	Affected: 2.0.3 , ≤ 2.5.3 (custom) Unaffected: 2.5.5

Credits

Marek Alakša of Binary House

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8931",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T15:31:29.743050Z",
                "version": "2.0.3"
              },
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    "cna": {
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          "product": "Web Signer",
          "vendor": "Disig",
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              "lessThanOrEqual": "2.5.3",
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              "version": "2.0.3",
              "versionType": "custom"
            },
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            }
          ]
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          "type": "finder",
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        },
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          "url": "https://www.disig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer/"
        },
        {
          "url": "https://download.disigcdn.sk/cdn/products/websigner2/changelog.en.txt"
        },
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          "url": "https://download.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt"
        },
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          "url": "https://qesportal.sk/Portal/en/Info/News#websigner255"
        },
        {
          "url": "https://qesportal.sk/Portal/sk/Info/News#websigner255"
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      "source": {
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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.

Action not permitted

GHSA-VCV9-HX6W-934W

CVE-2026-8931 (GCVE-0-2026-8931)

Tags

Sightings

Nomenclature