{"id":"UBUNTU-CVE-2026-93750","details":"http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyMatches() function that fails to properly validate Vary header wildcards due to byte-for-byte string comparison. Attackers can request URLs previously fetched by other clients to receive cached responses intended for different users, disclosing sensitive information across clients.","modified":"2026-09-21T21:40:58.982854604Z","published":"2026-09-21T00:00:00Z","upstream":["CVE-2026-93750"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-93750"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-93750"},{"type":"REPORT","url":"https://github.com/kornelski/http-cache-semantics/issues/57"},{"type":"REPORT","url":"https://github.com/kornelski/http-cache-semantics"},{"type":"REPORT","url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L483-L501"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-client-cache-disclosure-via-vary-wildcard"}],"affected":[{"package":{"name":"node-got","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/node-got?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.1.0-1","binary_name":"node-got"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93750.json"}},{"package":{"name":"node-got","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-got?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.1.0-1","binary_name":"node-got"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93750.json"}},{"package":{"name":"node-got","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-got?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.1+~cs53.13.17-3","11.8.2+~cs58.7.32-2","11.8.3+~cs58.7.37-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-got","binary_version":"11.8.3+~cs58.7.37-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93750.json"}},{"package":{"name":"node-got","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-got?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-3"],"ecosystem_specific":{"binaries":[{"binary_version":"11.8.5+~cs58.13.36-3","binary_name":"node-got"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93750.json"}},{"package":{"name":"node-got","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-got?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-5","11.8.5+~cs58.13.36-6"],"ecosystem_specific":{"binaries":[{"binary_name":"node-got","binary_version":"11.8.5+~cs58.13.36-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93750.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}