Vulnerability-Lookup

CVE-2026-12071 (GCVE-0-2026-12071)

Vulnerability from cvelistv5 – Published: 2026-08-07 09:40 – Updated: 2026-09-07 12:40

Title

TeamDavid: Header Injection leading to Open Redirect via URL-encoded characters

Summary

The Webbox of TeamDavid by Tobit Laboratories AG constructs redirect URLs using user-supplied input, which is appended to the redirect target in a 302 HTTP response. By using URL-encoded characters such as “%2e” (representing a dot), an attacker can manipulate the portion of the URL following the top-level domain (TLD). If a similar, registerable TLD exists (for example, if “.com” is the application’s domain, and “.company” is available for registration), an attacker can craft a URL to redirect users to a malicious “.company” domain. By using URL-encoded line feeds, it becomes possible to insert arbitrary response headers in the server's HTTP response. This issue affects TeamDavid before Rollout 528. Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 11:19 UTC

CWE

CWE-601 - URL redirection to untrusted site ('open redirect')

Assigner

NCSC.ch CNA under the mitre root

CNA scorecard B 79/100 over 81 records in the last 180 days details

References

2 references

URL	Tags
https://chayns.net/77892-10814/tapp/763210?postId=11454	release-notes
https://labs.infoguard.ch/posts/22-cves-in-david-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Tobit Laboratories AG	TeamDavid	Affected: 0 , < Rollout 528 (custom)	guessed

Credits

Dario Weiss of InfoGuard Labs Olivier Becker of InfoGuard Labs Lucas Dodgson of InfoGuard Labs

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-12071

Vulnerability from fkie_nvd - Published: 2026-08-07 10:16 - Updated: 2026-10-23 21:10

Severity

5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Summary

References

	URL	Tags
	vulnerability@ncsc.ch	https://chayns.net/77892-10814/tapp/763210?postId=11454
	vulnerability@ncsc.ch	https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "lang": "en",
      "value": "The Webbox of TeamDavid by\u00a0Tobit Laboratories AG\u00a0constructs redirect URLs using user-supplied input, \nwhich is appended to the redirect target in a 302 HTTP response. By \nusing URL-encoded characters such as \u201c%2e\u201d (representing a dot), an \nattacker can manipulate the portion of the URL following the top-level \ndomain (TLD). If a similar, registerable TLD exists (for example, if \n\u201c.com\u201d is the application\u2019s domain, and \u201c.company\u201d is available for \nregistration), an attacker can craft a URL to redirect users to a \nmalicious \u201c.company\u201d domain. By using URL-encoded line feeds, it becomes\n possible to insert arbitrary response headers in the server\u0027s HTTP \nresponse.\n\n\n\n\n\n\nThis issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality."
    },
    {
      "lang": "es",
      "value": "El Webbox de TeamDavid de Tobit Laboratories AG construye URLs de redirecci\u00f3n utilizando entrada proporcionada por el usuario, que se a\u00f1ade al objetivo de redirecci\u00f3n en una respuesta HTTP 302. Al utilizar caracteres codificados en URL como \u2019%2e\u2019 (que representa un punto), un atacante puede manipular la porci\u00f3n de la URL que sigue al dominio de nivel superior (TLD). Si existe un TLD similar y registrable (por ejemplo, si \u2019.com\u2019 es el dominio de la aplicaci\u00f3n y \u2019.company\u2019 est\u00e1 disponible para registro), un atacante puede elaborar una URL para redirigir a los usuarios a un dominio \u2019.company\u2019 malicioso. Al utilizar saltos de l\u00ednea codificados en URL, se hace posible insertar encabezados de respuesta arbitrarios en la respuesta HTTP del servidor.\n\nEste problema afecta a TeamDavid hasta el Rollout 524."
    }
  ],
  "id": "CVE-2026-12071",
  "lastModified": "2026-10-23T21:10:00.157",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "vulnerability@ncsc.ch",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-12071",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-10T11:19:50.374307Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-07T10:16:56.297",
  "references": [
    {
      "source": "vulnerability@ncsc.ch",
      "url": "https://chayns.net/77892-10814/tapp/763210?postId=11454"
    },
    {
      "source": "vulnerability@ncsc.ch",
      "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/"
    }
  ],
  "sourceIdentifier": "vulnerability@ncsc.ch",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "vulnerability@ncsc.ch",
      "type": "Secondary"
    }
  ]
}

GHSA-JRWC-G36X-GQC7

Vulnerability from github – Published: 2026-08-07 12:31 – Updated: 2026-09-07 15:33

Details

This issue affects TeamDavid through Rollout 524.

Severity

5.3 (Medium)


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

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-12071"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-07T10:16:56Z",
    "severity": "MODERATE"
  },
  "details": "The Webbox of TeamDavid by\u00a0Tobit Laboratories AG\u00a0constructs redirect URLs using user-supplied input, \nwhich is appended to the redirect target in a 302 HTTP response. By \nusing URL-encoded characters such as \u201c%2e\u201d (representing a dot), an \nattacker can manipulate the portion of the URL following the top-level \ndomain (TLD). If a similar, registerable TLD exists (for example, if \n\u201c.com\u201d is the application\u2019s domain, and \u201c.company\u201d is available for \nregistration), an attacker can craft a URL to redirect users to a \nmalicious \u201c.company\u201d domain. By using URL-encoded line feeds, it becomes\n possible to insert arbitrary response headers in the server\u0027s HTTP \nresponse.\n\n\n\nThis issue affects TeamDavid through Rollout 524.",
  "id": "GHSA-jrwc-g36x-gqc7",
  "modified": "2026-09-07T15:33:44Z",
  "published": "2026-08-07T12:31:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12071"
    },
    {
      "type": "WEB",
      "url": "https://chayns.net/77892-10814/tapp/763210?postId=11454"
    },
    {
      "type": "WEB",
      "url": "https://david.tobit.software/releasenotes"
    },
    {
      "type": "WEB",
      "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-12071 (GCVE-0-2026-12071)

FKIE_CVE-2026-12071

GHSA-JRWC-G36X-GQC7

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour