{"id":"EUVD-2025-200211","revision":"7a461b51931a402bb40565b10add5d97","records":[{"revision":"7a461b51931a402bb40565b10add5d97","observedAt":"2026-10-29T21:27:08.596+00:00","statement":{"source":"euvd","id":"EUVD-2025-200211","aliases":["CVE-2025-10543","GHSA-32fw-gq77-f2f2"],"title":"In Eclipse Paho Go MQTT v3.1 library (paho.mqtt.golang) versions <=1.5.0 UTF-8 encoded strings, passed into the library, may be incorrectly encoded if their length exceeds 65535 bytes. This may lead to unexpected content in packets sent to …","description":"In Eclipse Paho Go MQTT v3.1 library (paho.mqtt.golang) versions <=1.5.0 UTF-8 encoded strings, passed into the library, may be incorrectly encoded if their length exceeds 65535 bytes. This may lead to unexpected content in packets sent to the server (for example, part of an MQTT topic may leak into the message body in a PUBLISH packet).\n\n\nThe issue arises because the length of the data passed in was converted from an int64/int32 (depending upon CPU) to an int16 without checks for overflows. The int16 length was then written, followed by the data (e.g. topic). This meant that when the data (e.g. topic) was over 65535 bytes then the amount of data written exceeds what the length field indicates. This could lead to a corrupt packet, or mean that the excess data leaks into another field (e.g. topic leaks into message body).","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":null}],"references":["https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/254"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-200211","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Dec 2, 2025, 8:18:16 AM","dateUpdated":"Dec 2, 2025, 1:55:51 PM"},"relatedAdvisories":[{"id":"msrc_CVE-2025-10543","title":"CVE-2025-10543","vulnerabilityIds":["CVE-2025-10543"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2025-200211","identifiers":["EUVD-2025-200211","CVE-2025-10543","GHSA-32fw-gq77-f2f2"]},"retained":false,"historicalAffected":[]}],"coverage":[]}