CVE-2026-30921

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{"affected": [{"affectedData": [{"product": "oneuptime", "vendor": "OneUptime", "versions": [{"status": "affected", "version": "< 10.0.20"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*", "matchCriteriaId": "47A8362E-263D-46E0-8339-83F9AFDC973D", "versionEndExcluding": "10.0.20", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OneUptime is a solution for monitoring and managing online services. Prior to 10.0.20, OneUptime Synthetic Monitors allow low-privileged project users to submit custom Playwright code that is executed on the oneuptime-probe service. In the current implementation, this untrusted code is run inside Node's vm and is given live host Playwright objects such as browser and page. This creates a distinct server-side RCE primitive: the attacker does not need the classic this.constructor.constructor(...) sandbox escape. Instead, the attacker can directly use the injected Playwright browser object to reach browser.browserType().launch(...) and spawn an arbitrary executable on the probe host/container. This vulnerability is fixed in 10.0.20."}, {"lang": "es", "value": "OneUptime es una soluci\u00f3n para monitorear y gestionar servicios en l\u00ednea. Antes de la versi\u00f3n 10.0.20, los Monitores Sint\u00e9ticos de OneUptime permiten a usuarios de proyecto con bajos privilegios enviar c\u00f3digo Playwright personalizado que se ejecuta en el servicio oneuptime-probe. En la implementaci\u00f3n actual, este c\u00f3digo no confiable se ejecuta dentro de la vm de Node y se le otorgan objetos Playwright de host en vivo como navegador y p\u00e1gina. Esto crea una primitiva RCE del lado del servidor distinta: el atacante no necesita el cl\u00e1sico escape de sandbox this.constructor.constructor(...). En su lugar, el atacante puede usar directamente el objeto navegador de Playwright inyectado para alcanzar browser.browserType().launch(...) y generar un ejecutable arbitrario en el host/contenedor de la sonda. Esta vulnerabilidad se corrige en la versi\u00f3n 10.0.20."}], "id": "CVE-2026-30921", "lastModified": "2026-06-17T10:33:09.203", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-30921", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T14:13:48.408035Z", "version": "2.0.3"}}]}, "published": "2026-03-10T17:40:16.160", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-4j36-39gm-8vq8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-749"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,10.0.20)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "oneuptime", "source": "cna", "vendor": "OneUptime"}, "product": "oneuptime", "vendor": "oneuptime"}], "analysis": {"en": {"generated_at": "2026-04-16T10:00:56.279355+00:00", "value": {"mitigation_remediation": ["Update OneUptime to version 10.0.20 or newer, which removes the exposed Playwright objects from the synthetic monitor execution context.", "Disable or remove synthetic monitor creation for users that do not require it, or restrict the ability to edit existing monitors to higher\u2011privileged users only.", "Monitor system logs for unexpected process launches on the probe host and review Playwright activity logs to detect any attempts to manipulate browser objects."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected vendor is OneUptime (product OneUptime), and the risk applies to all installations of OneUptime prior to version 10.0.20. The synthetic monitors are enabled by default in these versions, and any user with low privileges who can add or edit a monitor may inject malicious code. The patch introduces a restriction that prevents untrusted scripts from accessing host\u2011level Playwright objects.", "description_and_impact": "The vulnerability resides in OneUptime's synthetic monitoring feature, which permits low\u2011privileged project users to submit arbitrary Playwright scripts that are executed on the probe service. The code runs inside a Node.js vm context but is passed live host Playwright objects such as browser and page. Because the trusted vm does not sandbox these objects, an attacker can invoke browser.browserType().launch(...) from the injected script to spawn arbitrary processes on the probe host or container. This capability constitutes server\u2011side remote code execution. The weakness is represented by CWE\u2011749, indicating a trusted library used with untrusted data.", "risk_and_exploitability": "The CVSS score of 10 highlights maximum severity, though the EPSS score is below 1% and the vulnerability is not listed in CISA\u2019s KEV catalogue, indicating limited public exploitation evidence to date. Nevertheless, the attack path requires only a low\u2011privileged user to submit a monitor script, which is a reasonable threat in environments where such users are plentiful. Modern patch management processes should treat this as critical and prioritize upgrading to version 10.0.20. Failure to patch could allow an attacker to execute arbitrary code on the host, compromising confidentiality, integrity, and availability of the monitoring infrastructure."}}}}, "created": "2026-03-10T14:06:23.634445+00:00", "updated": "2026-04-16T10:15:26.099153+00:00", "vendors": ["oneuptime", "oneuptime$PRODUCT$oneuptime"]}