{"id":"UBUNTU-CVE-2026-42504","details":"Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.","modified":"2026-09-23T18:46:24.682873214Z","published":"2026-06-02T23:16:00Z","upstream":["CVE-2026-42504"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42504"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42504"},{"type":"REPORT","url":"https://github.com/golang/go/issues/79217"},{"type":"REPORT","url":"https://github.com/golang/go/commit/7f24db453a60faf6a3546d60bb02917a0a7aace0"},{"type":"REPORT","url":"https://github.com/golang/go/commit/b79e0339290e14b3b2de1dc4942b8a88701ddb02"}],"affected":[{"package":{"name":"golang-1.24","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-1.24?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.4-1ubuntu1~22.04.1","1.24.4-1ubuntu1~22.04.2","1.24.13-2~22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.24","binary_version":"1.24.13-2~22.04.1"},{"binary_name":"golang-1.24-go","binary_version":"1.24.13-2~22.04.1"},{"binary_name":"golang-1.24-src","binary_version":"1.24.13-2~22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.24","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-1.24?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.4-1ubuntu1~24.04.1","1.24.4-1ubuntu1~24.04.2","1.24.13-2~24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.24","binary_version":"1.24.13-2~24.04.1"},{"binary_name":"golang-1.24-go","binary_version":"1.24.13-2~24.04.1"},{"binary_name":"golang-1.24-src","binary_version":"1.24.13-2~24.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.24","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/golang-1.24?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.2-1","1.24.2-2","1.24.4-1","1.24.4-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.24","binary_version":"1.24.4-1ubuntu1"},{"binary_version":"1.24.4-1ubuntu1","binary_name":"golang-1.24-go"},{"binary_name":"golang-1.24-src","binary_version":"1.24.4-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.25","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/golang-1.25?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.0-0ubuntu1","1.25.7-2~25.10.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.25.7-2~25.10.1","binary_name":"golang-1.25"},{"binary_name":"golang-1.25-go","binary_version":"1.25.7-2~25.10.1"},{"binary_name":"golang-1.25-src","binary_version":"1.25.7-2~25.10.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.24","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-1.24?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.4-1ubuntu1","1.24.9-1","1.24.13-2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.24","binary_version":"1.24.13-2"},{"binary_name":"golang-1.24-go","binary_version":"1.24.13-2"},{"binary_name":"golang-1.24-src","binary_version":"1.24.13-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.25","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-1.25?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.0-0ubuntu1","1.25.7-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.25.7-2","binary_name":"golang-1.25"},{"binary_name":"golang-1.25-go","binary_version":"1.25.7-2"},{"binary_name":"golang-1.25-src","binary_version":"1.25.7-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}},{"package":{"name":"golang-1.26","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-1.26?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26~rc3-2","1.26.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-1.26","binary_version":"1.26.0-1"},{"binary_name":"golang-1.26-go","binary_version":"1.26.0-1"},{"binary_name":"golang-1.26-src","binary_version":"1.26.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42504.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}