The encoding/xml package in Go (all versions) does not correctly preserve the semantics of attribute namespace prefixes during tokenization round-trips, which allows an attacker to craft inputs that behave in conflicting ways during different stages of processing in affected downstream applications. CREATE(Triage):(User=admin) CVE-2020-29509 (https://nvd.nist.gov/vuln/detail/CVE-2020-29509)