CVE-2026-14574

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Eclipse Theia", "vendor": "Eclipse Foundation", "versions": [{"lessThan": "1.74.0", "status": "affected", "version": "0.7.0", "versionType": "semver"}]}], "source": "emo@eclipse.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*", "matchCriteriaId": "E14E06B2-19A9-4DF8-93A2-1CD8EBAE4DD7", "versionEndExcluding": "1.74.0", "versionStartIncluding": "0.7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the `PreferenceUtils.merge` function in `@theia/core` recursively merges preference values without rejecting prototype-related keys (`__proto__`, `constructor`, `prototype`). Because this function is invoked by `PreferenceServiceImpl.doResolve` for every preference resolution across scopes (default, user, workspace, folder), a crafted preference value in a workspace settings file (`.theia/settings.json` or `.vscode/settings.json`) can pollute `Object.prototype` when the user opens the workspace, potentially altering application logic across the Theia process."}, {"lang": "es", "value": "En las versiones de Eclipse Theia 0.7.0 y hasta la 1.73.1 inclusive, la funci\u00f3n \u2019PreferenceUtils.merge\u2019 en \u2019@theia/core\u2019 fusiona recursivamente valores de preferencias sin rechazar claves relacionadas con el prototipo (\u2019__proto__\u2019, \u2019constructor\u2019, \u2019prototype\u2019). Debido a que esta funci\u00f3n es invocada por \u2019PreferenceServiceImpl.doResolve\u2019 para cada resoluci\u00f3n de preferencia a trav\u00e9s de \u00e1mbitos (predeterminado, usuario, espacio de trabajo, carpeta), un valor de preferencia manipulado en un archivo de configuraci\u00f3n del espacio de trabajo (\u2019.theia/settings.json\u2019 o \u2019.vscode/settings.json\u2019) puede contaminar \u2019Object.prototype\u2019 cuando el usuario abre el espacio de trabajo, alterando potencialmente la l\u00f3gica de la aplicaci\u00f3n en todo el proceso de Theia."}], "id": "CVE-2026-14574", "lastModified": "2026-10-23T21:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "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": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.7, "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": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:L/SA:L/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": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "emo@eclipse.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-14574", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-05T13:04:59.354596Z", "version": "2.0.3"}}]}, "published": "2026-08-05T11:16:25.030", "references": [{"source": "emo@eclipse.org", "tags": ["Broken Link"], "url": "https://github.com/eclipse-theia/theia/security/advisories/GHSA-f3w9-qfw3-xr32"}, {"source": "emo@eclipse.org", "tags": ["Vendor Advisory"], "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/157"}, {"source": "emo@eclipse.org", "tags": ["Exploit", "Mitigation", "Vendor Advisory", "Issue Tracking"], "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/567"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/567"}], "sourceIdentifier": "emo@eclipse.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "emo@eclipse.org", "type": "Secondary"}]}

{}

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