{"id":"CLEANSTART-2026-CP20786","summary":"Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU","details":"Multiple security vulnerabilities affect the nats-streaming package. Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU. See references for individual vulnerability details.","modified":"2026-06-22T09:45:05.606926624Z","published":"2026-06-10T01:14:55.975405Z","upstream":["CVE-2026-27145","CVE-2026-33811","CVE-2026-33814","CVE-2026-39817","CVE-2026-39819","CVE-2026-39820","CVE-2026-39823","CVE-2026-39824","CVE-2026-39825","CVE-2026-39826","CVE-2026-39827","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39833","CVE-2026-39834","CVE-2026-39835","CVE-2026-39836","CVE-2026-42499","CVE-2026-42501","CVE-2026-42504","CVE-2026-42507","CVE-2026-42508","CVE-2026-46595","CVE-2026-46597","CVE-2026-46598"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-CP20786.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-27145"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-33811"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-33814"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39817"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39819"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39820"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39823"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39824"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39825"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39826"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39827"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39828"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39829"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39830"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39831"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39832"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39833"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39834"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39835"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-39836"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-42499"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-42501"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-42504"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-42507"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-42508"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-46595"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-46597"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-46598"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27145"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33811"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33814"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39817"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39819"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39820"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39823"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39824"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39825"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39826"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39827"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39828"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39829"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39830"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39831"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39832"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39833"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39834"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39835"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39836"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42499"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42501"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42504"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42507"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42508"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46595"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46597"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46598"}],"affected":[{"package":{"name":"nats-streaming","ecosystem":"CleanStart"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.24.6-r1"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-CP20786.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}