FKIE_CVE-2026-23892
Vulnerability from fkie_nvd - Published: 2026-01-27 19:16 - Updated: 2026-02-02 14:39
Severity ?
Summary
OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up to and including 1.11.5 are affected by a (theoretical) timing attack vulnerability that allows API key extraction over the network. Due to using character based comparison that short-circuits on the first mismatched character during API key validation, rather than a cryptographical method with static runtime regardless of the point of mismatch, an attacker with network based access to an affected OctoPrint could extract API keys valid on the instance by measuring the response times of the denied access responses and guess an API key character by character. The vulnerability is patched in version 1.11.6. The likelihood of this attack actually working is highly dependent on the network's latency, noise and similar parameters. An actual proof of concept was not achieved so far. Still, as always administrators are advised to not expose their OctoPrint instance on hostile networks, especially not on the public Internet.
References
{
"configurations": [
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"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:a:octoprint:octoprint:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4936F1B5-7DD9-449F-AB98-64CDF0719211",
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"descriptions": [
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"lang": "en",
"value": "OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up to and including 1.11.5 are affected by a (theoretical) timing attack vulnerability that allows API key extraction over the network. Due to using character based comparison that short-circuits on the first mismatched character during API key validation, rather than a cryptographical method with static runtime regardless of the point of mismatch, an attacker with network based access to an affected OctoPrint could extract API keys valid on the instance by measuring the response times of the denied access responses and guess an API key character by character. The vulnerability is patched in version 1.11.6. The likelihood of this attack actually working is highly dependent on the network\u0027s latency, noise and similar parameters. An actual proof of concept was not achieved so far. Still, as always administrators are advised to not expose their OctoPrint instance on hostile networks, especially not on the public Internet."
},
{
"lang": "es",
"value": "OctoPrint proporciona una interfaz web para controlar impresoras 3D de consumo. Las versiones de OctoPrint hasta la 1.11.5 inclusive est\u00e1n afectadas por una vulnerabilidad (te\u00f3rica) de ataque de temporizaci\u00f3n que permite la extracci\u00f3n de claves API a trav\u00e9s de la red. Debido al uso de una comparaci\u00f3n basada en caracteres que se interrumpe en el primer car\u00e1cter no coincidente durante la validaci\u00f3n de la clave API, en lugar de un m\u00e9todo criptogr\u00e1fico con tiempo de ejecuci\u00f3n est\u00e1tico independientemente del punto de no coincidencia, un atacante con acceso basado en red a una instancia de OctoPrint afectada podr\u00eda extraer claves API v\u00e1lidas en la instancia midiendo los tiempos de respuesta de las respuestas de acceso denegado y adivinar una clave API car\u00e1cter por car\u00e1cter. La vulnerabilidad est\u00e1 parcheada en la versi\u00f3n 1.11.6. La probabilidad de que este ataque funcione realmente depende en gran medida de la latencia, el ruido y par\u00e1metros similares de la red. Una prueba de concepto real no se ha logrado hasta ahora. Aun as\u00ed, como siempre, se aconseja a los administradores que no expongan su instancia de OctoPrint en redes hostiles, especialmente no en la Internet p\u00fablica."
}
],
"id": "CVE-2026-23892",
"lastModified": "2026-02-02T14:39:36.583",
"metrics": {
"cvssMetricV31": [
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
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"exploitabilityScore": 2.2,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
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"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
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"attackRequirements": "PRESENT",
"attackVector": "ADJACENT",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 6.0,
"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": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"source": "security-advisories@github.com",
"type": "Secondary"
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"published": "2026-01-27T19:16:16.027",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
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"url": "https://github.com/OctoPrint/OctoPrint/commit/249fd80ab01bc4b7dabedff768230a0fb5d01a8c"
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"url": "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-xg4x-w2j3-57h6"
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"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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"lang": "en",
"value": "CWE-208"
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"source": "security-advisories@github.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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