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    2 vulnerabilities by kanbn

    CVE-2026-32255 (GCVE-0-2026-32255)

    Vulnerability from nvd – Published: 2026-03-18 23:11 – Updated: 2026-03-19 16:11
    VLAI
    Title
    Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
    Summary
    Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).
    Severity
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    kanbn kan Affected: < 0.5.5
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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                "id": "CVE-2026-32255",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
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          "vendor": "kanbn",
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      ],
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        {
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          "value": "Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.)."
        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
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            "confidentialityImpact": "HIGH",
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          ],
          "url": "https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg"
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      "title": "Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint"
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    CVE-2026-32255 (GCVE-0-2026-32255)

    Vulnerability from cvelistv5 – Published: 2026-03-18 23:11 – Updated: 2026-03-19 16:11
    VLAI
    Title
    Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
    Summary
    Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).
    Severity
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    kanbn kan Affected: < 0.5.5
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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        "metrics": [
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                "id": "CVE-2026-32255",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
          "product": "kan",
          "vendor": "kanbn",
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        {
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        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
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