CVE-2026-22026

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{"affected": [{"affectedData": [{"product": "CryptoLib", "vendor": "nasa", "versions": [{"status": "affected", "version": "< 1.4.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nasa:cryptolib:*:*:*:*:*:*:*:*", "matchCriteriaId": "AE1BE91E-2901-42AF-BC66-762CFA7A2582", "versionEndExcluding": "1.4.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the libcurl write_callback function in the KMC crypto service client allows unbounded memory growth by reallocating response buffers without any size limit or overflow check. A malicious KMC server can return arbitrarily large HTTP responses, forcing the client to allocate excessive memory until the process is terminated by the OS. This issue has been patched in version 1.4.3."}, {"lang": "es", "value": "CryptoLib proporciona una soluci\u00f3n \u00fanicamente de software utilizando el Protocolo de Seguridad de Enlace de Datos Espaciales CCSDS - Procedimientos Extendidos (SDLS-EP) para asegurar las comunicaciones entre una nave espacial que ejecuta el Sistema de Vuelo central (cFS) y una estaci\u00f3n terrestre. Antes de la versi\u00f3n 1.4.3, la funci\u00f3n write_callback de libcurl en el cliente del servicio criptogr\u00e1fico KMC permite un crecimiento ilimitado de la memoria al reasignar b\u00faferes de respuesta sin ning\u00fan l\u00edmite de tama\u00f1o o verificaci\u00f3n de desbordamiento. Un servidor KMC malicioso puede devolver respuestas HTTP arbitrariamente grandes, forzando al cliente a asignar memoria excesiva hasta que el proceso sea terminado por el SO. Este problema ha sido parcheado en la versi\u00f3n 1.4.3."}], "id": "CVE-2026-22026", "lastModified": "2026-06-17T10:19:22.863", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "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:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/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": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-22026", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-13T21:47:49.912729Z", "version": "2.0.3"}}]}, "published": "2026-01-10T01:16:18.843", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/nasa/CryptoLib/releases/tag/v1.4.3"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T07:19:55.258963+00:00", "value": {"mitigation_remediation": ["Upgrade CryptoLib to version 1.4.3 or later, which implements an upper bound on response buffer allocation.", "Configure the KMC crypto service client to enforce a maximum acceptable response size or validate response length before allocating memory to prevent excessive allocation.", "Monitor traffic to the KMC service and restrict connections from untrusted KMC servers, using network filtering or firewalls to limit the volume of data that can be received from external sources."], "summary": {"action": "Patch", "impact": "Resource Exhaustion leading to Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects NASA\u2019s CryptoLib software for all releases before 1.4.3. Systems that run the Core Flight System on a spacecraft and communicate with a ground\u2011station using CryptoLib are impacted, regardless of the specific operating environment, as long as the vulnerable version is in use.", "description_and_impact": "CryptoLib uses the CCSDS Space Data Link Security Protocol to protect ground\u2011station communications. Prior to version 1.4.3 the libcurl write_callback in the KMC crypto service client can reallocate response buffers without any bounds checking, allowing a malicious KMC server to send arbitrarily large HTTP responses. This causes the client process to allocate more memory than the system can provide, eventually exhausting resources and terminating the process, which results in a denial of service for the affected component.", "risk_and_exploitability": "The flaw carries a CVSS score of 8.2, indicating high severity. Exploitation probability is very low according to the EPSS (<1%) and the vulnerability is not listed in the CISA KEV catalog. The most likely attack vector is a malicious or compromised KMC server that can control the content of the HTTP response sent to the CryptoLib client. Successful exploitation requires network access to the KMC service; no local privilege escalation or code execution is involved, but an attacker can trigger a service crash and interrupt secure communications."}}}}, "created": "2026-01-12T14:36:53.743863+00:00", "updated": "2026-04-18T07:30:36.023759+00:00", "vendors": ["nasa", "nasa$PRODUCT$cryptolib"]}