{"id":"GHSA-cqqj-4p63-rrmm","summary":"HTTP Request Smuggling in Netty","details":"HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an \"invalid fold.\"","aliases":["CVE-2019-20444"],"modified":"2025-07-02T15:50:12Z","published":"2020-02-21T18:55:24Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2020-02-20T20:54:33Z","nvd_published_at":"2020-01-29T21:15:00Z","cwe_ids":["CWE-444"],"severity":"CRITICAL"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-20444"},{"type":"WEB","url":"https://github.com/netty/netty/issues/9866"},{"type":"WEB","url":"https://github.com/netty/netty/pull/9871/files#diff-e26989b9171ef22c27c9f7d80689cfb059d568c9bd10e75970d96c02d0654878"},{"type":"WEB","url":"https://github.com/netty/netty/pull/9871"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra9fbfe7d4830ae675bf34c7c0f8c22fc8a4099f65706c1bc4f54c593%40%3Cissues.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra9fbfe7d4830ae675bf34c7c0f8c22fc8a4099f65706c1bc4f54c593@%3Cissues.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/raaac04b7567c554786132144bea3dcb72568edd410c1e6f0101742e7%40%3Cissues.flink.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/raaac04b7567c554786132144bea3dcb72568edd410c1e6f0101742e7@%3Cissues.flink.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rb3361f6c6a5f834ad3db5e998c352760d393c0891b8d3bea90baa836%40%3Ccommon-issues.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rb3361f6c6a5f834ad3db5e998c352760d393c0891b8d3bea90baa836@%3Ccommon-issues.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rb84c57670ec48ef23f4d07973b7fa69f629b8e7fcfb48874362feb6f%40%3Ccommits.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rb84c57670ec48ef23f4d07973b7fa69f629b8e7fcfb48874362feb6f@%3Ccommits.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc7eb5634b71d284483e58665b22bf274a69bd184d9bd7ede52015d91%40%3Ccommon-issues.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc7eb5634b71d284483e58665b22bf274a69bd184d9bd7ede52015d91@%3Ccommon-issues.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rcb2c59428f34d4757702f9ae739a8795bda7bea97b857e708a9c62c6%40%3Ccommon-commits.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rcb2c59428f34d4757702f9ae739a8795bda7bea97b857e708a9c62c6@%3Ccommon-commits.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rce71d33747010d32d31d90f5d737dae26291d96552f513a266c92fbb%40%3Cnotifications.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rce71d33747010d32d31d90f5d737dae26291d96552f513a266c92fbb@%3Cnotifications.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra2ace4bcb5cf487f72cbcbfa0f8cc08e755ec2b93d7e69f276148b08@%3Cissues.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra2ace4bcb5cf487f72cbcbfa0f8cc08e755ec2b93d7e69f276148b08%40%3Cissues.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra1a71b576a45426af5ee65255be9596ff3181a342f4ba73b800db78f@%3Cdev.geode.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra1a71b576a45426af5ee65255be9596ff3181a342f4ba73b800db78f%40%3Cdev.geode.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9b20cdac704cf9a583400350e2d5b576fa8417c18ddb961201676c60@%3Ccommits.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9b20cdac704cf9a583400350e2d5b576fa8417c18ddb961201676c60%40%3Ccommits.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r96e08f929234e8ba1ef4a93a0fd2870f535a1f9ab628fabc46115986@%3Cdev.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r96e08f929234e8ba1ef4a93a0fd2870f535a1f9ab628fabc46115986%40%3Cdev.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r959474dcf7f88565ed89f6252ca5a274419006cb71348f14764b183d@%3Ccommits.cassandra.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r959474dcf7f88565ed89f6252ca5a274419006cb71348f14764b183d%40%3Ccommits.cassandra.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r91e0fa345c86c128b75a4a791b4b503b53173ff4c13049ac7129d319@%3Cnotifications.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r91e0fa345c86c128b75a4a791b4b503b53173ff4c13049ac7129d319%40%3Cnotifications.zookeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r90030b0117490caed526e57271bf4d7f9b012091ac5083c895d16543@%3Ccommon-issues.hadoop.apache.org%3E"},{"type":"WEB","url":"https://lists.apach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