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CVE-2026-53459 (GCVE-0-2026-53459)

Vulnerability from cvelistv5 – Published: 2026-09-15 17:25 – Updated: 2026-09-15 17:25
VLAI
Title
Bambuddy's authentication fails open on database errors, allowing unauthenticated access to all endpoints
Summary
Bambuddy is a self-hosted print archive and management system for Bambu Lab 3D printers. Starting in version 0.1.6 and prior to version 0.2.4.4, a fail-open in the authentication code allows any attacker to bypass authentication by flooding a public endpoint to exhaust resources causing database access to fail, granting unauthenticated access to all protected endpoints. Version 0.2.4.4 patches the issue.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-636 - Not Failing Securely ('Failing Open')
  • CWE-755 - Improper Handling of Exceptional Conditions
Assigner
References
Impacted products
Vendor Product Version CPE status
maziggy bambuddy Affected: >= 0.1.6, < 0.2.4.4
guessed Create a notification for this product.
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  "containers": {
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        {
          "product": "bambuddy",
          "vendor": "maziggy",
          "versions": [
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          "value": "Bambuddy is a self-hosted print archive and management system for Bambu Lab 3D printers. Starting in version 0.1.6 and prior to version 0.2.4.4, a fail-open in the authentication code allows any attacker to bypass authentication by flooding a public endpoint to exhaust resources causing database access to fail, granting unauthenticated access to all protected endpoints. Version 0.2.4.4 patches the issue."
        }
      ],
      "metrics": [
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            "attackRequirements": "NONE",
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            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
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          }
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      "problemTypes": [
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            {
              "cweId": "CWE-636",
              "description": "CWE-636: Not Failing Securely (\u0027Failing Open\u0027)",
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              "type": "CWE"
            }
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        },
        {
          "descriptions": [
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          "tags": [
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          "url": "https://github.com/maziggy/bambuddy/commit/845ad39b19bf99afeea571c6bae09695777e1460"
        },
        {
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          "tags": [
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          "url": "https://github.com/maziggy/bambuddy/blob/449502cc9fc1cec04f06d31512420eac729fd032/backend/app/core/auth.py#L473-L483"
        },
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        },
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          "tags": [
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          "url": "https://github.com/maziggy/bambuddy/blob/main/CHANGELOG.md"
        },
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          "tags": [
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          ],
          "url": "https://github.com/maziggy/bambuddy/releases/tag/v0.2.4.4"
        }
      ],
      "source": {
        "advisory": "GHSA-6mf4-q26m-47pv",
        "discovery": "UNKNOWN"
      },
      "title": "Bambuddy\u0027s authentication fails open on database errors, allowing unauthenticated access to all endpoints"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-53459",
    "datePublished": "2026-09-15T17:25:27.247Z",
    "dateReserved": "2026-06-09T16:31:21.495Z",
    "dateUpdated": "2026-09-15T17:25:27.247Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}



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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

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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.