{"id":"UBUNTU-CVE-2025-30204","details":"golang-jwt is a Go implementation of JSON Web Tokens. Starting in version 3.2.0 and prior to versions 5.2.2 and 4.5.2, the function parse.ParseUnverified splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request whose Authorization header consists of Bearer  followed by many period characters, a call to that function incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This issue is fixed in 5.2.2 and 4.5.2.","modified":"2025-09-08T17:08:13Z","published":"2025-03-21T22:15:00Z","upstream":["CVE-2025-30204"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-30204"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-30204"}],"affected":[{"package":{"name":"golang-github-golang-jwt-jwt","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-github-golang-jwt-jwt@4.2.0-1ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.0-1","4.1.0-2","4.2.0-1","4.2.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-golang-jwt-jwt-dev","binary_version":"4.2.0-1ubuntu0.1"},{"binary_name":"jwt","binary_version":"4.2.0-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30204.json"}},{"package":{"name":"golang-github-golang-jwt-jwt","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-github-golang-jwt-jwt@5.0.0+really4.5.0-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.3-1build1","5.0.0+really4.5.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-golang-jwt-jwt-dev","binary_version":"5.0.0+really4.5.0-1"},{"binary_version":"5.0.0+really4.5.0-1","binary_name":"jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30204.json"}},{"package":{"name":"golang-github-golang-jwt-jwt-v5","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-github-golang-jwt-jwt-v5@5.2.0-2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-golang-jwt-jwt-v5-dev","binary_version":"5.2.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30204.json"}}],"schema_version":"1.7.3","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"}]}