CVE-2026-38427

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue in fetch_jpg() in xdrv_10_scripter.ino in Tasmota through 15.3.0.3 allows a remote attacker to cause heap buffer overflow. The Content-Length from a JPEG stream is stored in a uint16_t variable; values above 65535 wrap around, causing allocation of a smaller buffer than the data actually read."}, {"lang": "es", "value": "Un problema en fetch_jpg() en xdrv_10_scripter.ino en Tasmota hasta 15.3.0.3 permite a un atacante remoto causar un desbordamiento de b\u00fafer de pila. El Content-Length de un flujo JPEG se almacena en una variable uint16_t; los valores superiores a 65535 dan la vuelta, causando la asignaci\u00f3n de un b\u00fafer m\u00e1s peque\u00f1o que los datos realmente le\u00eddos."}], "id": "CVE-2026-38427", "lastModified": "2026-10-19T22:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-38427", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-27T18:19:51.892024Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:16:46.023", "references": [{"source": "cve@mitre.org", "url": "https://github.com/arendst/Tasmota/blob/c207cc2/tasmota/tasmota_xdrv_driver/xdrv_10_scripter.ino"}, {"source": "cve@mitre.org", "url": "https://github.com/sermikr0/CVE-2026-38427"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/sermikr0/CVE-2026-38427"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,15.3.0.3]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "tasmota", "vendor": "arendst"}], "created": "2026-05-27T17:00:17.681473+00:00", "title": "Heap Buffer Overflow in Tasmota JPEG Fetch Function Enables Device Crash", "updated": "2026-05-30T21:22:33.333917+00:00", "vendors": ["arendst", "arendst$PRODUCT$tasmota"]}