CVE-2026-23892

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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."}, {"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": "2026-06-17T10:22:16.147", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "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"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23892", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-27T19:13:25.472857Z", "version": "2.0.3"}}]}, "published": "2026-01-27T19:16:16.027", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/OctoPrint/OctoPrint/commit/249fd80ab01bc4b7dabedff768230a0fb5d01a8c"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.6"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-xg4x-w2j3-57h6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-208"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T01:59:36.690171+00:00", "value": {"mitigation_remediation": ["Upgrade OctoPrint to version 1.11.6 or newer to eliminate the timing side\u2011channel.", "Restrict external network access by placing the OctoPrint server behind a firewall or VPN and blocking unsolicited inbound traffic.", "Enforce strict access controls: rotate or disable unused API keys, use strong authentication, and consider moving to multi\u2011factor authentication to reduce reliance on API key exposure."], "summary": {"action": "Patch", "impact": "API Key Disclosure"}, "threat_synthesis": {"affected_systems": "All OctoPrint releases up to and including version 1.11.5 are affected. The issue was fixed in OctoPrint 1.11.6 and later. Administrators should verify that their deployment uses a patched version.", "description_and_impact": "OctoPrint employs a character\u2011by\u2011character comparison for API key validation that short\u2011circuits on the first mismatch. This allows an attacker who can measure response times on denied requests to infer each character of the key, effectively extracting the key over the network. Although no public proof of concept exists, the vulnerability can be exploited if network latency and noise conditions are favorable, exposing credentials that grant unrestricted control over attached printers.", "risk_and_exploitability": "The CVSS score of 6 indicates moderate impact, while the EPSS score of less than 1\u202f% reflects a very low estimated exploitation probability. The vulnerability is not listed in CISA\u2019s KEV catalog. An attacker requires network access to the OctoPrint instance, typically over a local network or public\u2011internet exposure, to perform the timing analysis. With sufficient network isolation and low latency, the attack becomes impractical, but the risk is higher for publicly exposed deployments."}}}}, "created": "2026-01-28T12:21:54.779434+00:00", "updated": "2026-04-18T02:00:10.475199+00:00", "vendors": ["octoprint", "octoprint$PRODUCT$octoprint"]}