{"id":"CVE-2023-3635","aliases":["GHSA-w33c-445m-f8w7"],"url":"https://o3.security/vulnerability/CVE-2023-3635","summary":"Okio GzipSource unhandled exception Denial of Service","details":"GzipSource does not handle an exception that might be raised when parsing a malformed gzip buffer. This may lead to denial of service of the Okio client when handling a crafted GZIP archive, by using the GzipSource class.\n\n","published":"2023-07-12T18:34:31.609Z","modified":"2026-07-24T04:00:14.922959994Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"com.squareup.okio:okio","fixedVersion":"3.4.0"},{"ecosystem":"Maven","name":"com.squareup.okio:okio","fixedVersion":"1.17.6"},{"ecosystem":"Maven","name":"com.squareup.okio:okio-jvm","fixedVersion":"3.4.0"}],"fix":{"url":"https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7b","label":"square/okio@81bce1a"},"references":[{"type":"WEB","url":"https://mvnrepository.com"},{"type":"WEB","url":"https://research.jfrog.com/vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3635.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3635"},{"type":"FIX","url":"https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7b"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-24T04:00:14.922959994Z"}}