FKIE_CVE-2025-26787

Vulnerability from fkie_nvd - Published: 2025-12-22 19:15 - Updated: 2026-11-04 22:10
Severity
4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Summary
An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2. The Admin CLI command used to configure Certificate access to the initial startup of the container sets a property of "allowany" to allow any user with a valid and trusted client auth certificate to connect. Admins can then set more restricted access to specific certificates. A logic error caused this admin CLI command to be run on each restart of the container instead of only the first startup as intended resetting the configuration to "allowany".
References
cve@mitre.orghttps://docs.keyfactor.com/signserver/latest/signserver-7-2-release-notesRelease Notes
cve@mitre.orghttps://support.keyfactor.com/hc/en-us/articles/33997706776987-SignServer-security-advisory-Container-vulnerability-CVE-2025-26787-fixed-in-version-7-2Vendor Advisory
Impacted products
Vendor Product Version
keyfactor signserver *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:keyfactor:signserver:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "607EC7CA-24F9-40C7-9C10-26943CFCB6A1",
              "versionEndExcluding": "7.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2. The Admin CLI command used to configure Certificate access to the initial startup of the container sets a property of \"allowany\" to allow any user with a valid and trusted client auth certificate to connect. Admins can then set more restricted access to specific certificates. A logic error caused this admin CLI command to be run on each restart of the container instead of only the first startup as intended resetting the configuration to \"allowany\"."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un error en la l\u00f3gica de arranque del contenedor de SignServer en las versiones de Keyfactor SignServer anteriores a la 7.2. El comando CLI de administraci\u00f3n utilizado para configurar el acceso a certificados en el arranque inicial del contenedor establece una propiedad \u2019allowany\u2019 para permitir que cualquier usuario con un certificado de autenticaci\u00f3n de cliente v\u00e1lido y de confianza se conecte. Los administradores pueden luego establecer un acceso m\u00e1s restringido a certificados espec\u00edficos. Un error de l\u00f3gica provoc\u00f3 que este comando CLI de administraci\u00f3n se ejecutara en cada reinicio del contenedor en lugar de solo en el primer arranque, como estaba previsto, restableciendo la configuraci\u00f3n a \u2019allowany\u2019."
    }
  ],
  "id": "CVE-2025-26787",
  "lastModified": "2026-11-04T22:10:00.210",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-26787",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-22T19:07:20.455739Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-22T19:15:48.630",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://docs.keyfactor.com/signserver/latest/signserver-7-2-release-notes"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://support.keyfactor.com/hc/en-us/articles/33997706776987-SignServer-security-advisory-Container-vulnerability-CVE-2025-26787-fixed-in-version-7-2"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-642"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.