{"id":"UBUNTU-CVE-2025-6497","details":"A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.","modified":"2026-05-20T16:23:40.481440617Z","published":"2025-06-23T01:15:00Z","upstream":["CVE-2025-6497"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-6497"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-6497"},{"type":"REPORT","url":"https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.313613"},{"type":"REPORT","url":"https://vuldb.com/?id.313613"},{"type":"REPORT","url":"https://vuldb.com/?submit.601008"}],"affected":[{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:5.2.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:5.2.0-2","binary_name":"libtidy5"},{"binary_version":"1:5.2.0-2","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:5.6.0-10","2:5.6.0-11","2:5.6.0-11ubuntu0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:5.6.0-11ubuntu0.20.04.1","binary_name":"libtidy5deb1"},{"binary_version":"2:5.6.0-11ubuntu0.20.04.1","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:5.6.0-11build1","2:5.6.0-11build2","2:5.6.0-11ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:5.6.0-11ubuntu0.22.04.1","binary_name":"libtidy5deb1"},{"binary_version":"2:5.6.0-11ubuntu0.22.04.1","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:5.6.0-11build2","2:5.6.0-11ubuntu1","2:5.6.0-11ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:5.6.0-11ubuntu2","binary_name":"libtidy5deb1"},{"binary_version":"2:5.6.0-11ubuntu2","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:5.8.0-1ubuntu1","2:5.8.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:5.8.0-2","binary_name":"libtidy58"},{"binary_version":"2:5.8.0-2","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:5.8.0-2","2:5.8.0-2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:5.8.0-2.1","binary_name":"libtidy58"},{"binary_version":"2:5.8.0-2.1","binary_name":"tidy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6497.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}