{"id":"UBUNTU-CVE-2026-102994","details":"pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.","modified":"2026-10-02T22:30:13.952878943Z","published":"2026-10-02T00:00:00Z","upstream":["CVE-2026-102994"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-102994"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-102994"},{"type":"REPORT","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246"},{"type":"REPORT","url":"https://github.com/py-pdf/pypdf/pull/4055"},{"type":"REPORT","url":"https://github.com/py-pdf/pypdf/commit/82501d2993c6387833c4949d205caeb188f8bb9e"},{"type":"REPORT","url":"https://github.com/py-pdf/pypdf/releases/tag/6.18.0"}],"affected":[{"package":{"name":"pypdf2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.23+git20141008-1","1.25.1-1","1.25.1-1ubuntu0.1~esm1","1.25.1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pypdf2","binary_version":"1.25.1-1ubuntu0.1~esm2"},{"binary_version":"1.25.1-1ubuntu0.1~esm2","binary_name":"python3-pypdf2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pypdf2?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0-2","1.26.0-2ubuntu0.1~esm1","1.26.0-2ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pypdf2","binary_version":"1.26.0-2ubuntu0.1~esm2"},{"binary_name":"python3-pypdf2","binary_version":"1.26.0-2ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pypdf2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0-2","1.26.0-3ubuntu1","1.26.0-3ubuntu1.20.04.1","1.26.0-3ubuntu1.20.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pypdf2","binary_version":"1.26.0-3ubuntu1.20.04.2"},{"binary_version":"1.26.0-3ubuntu1.20.04.2","binary_name":"python3-pypdf2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pypdf2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.26.0-4","1.26.0-4ubuntu0.22.04.1","1.26.0-4ubuntu0.22.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-pypdf2","binary_version":"1.26.0-4ubuntu0.22.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pypdf?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.1-1","3.17.4-1","4.0.0-1","4.0.1-1","4.0.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-pypdf","binary_version":"4.0.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pypdf2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.1-3","2.12.1-4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.12.1-4","binary_name":"python3-pypdf2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}},{"package":{"name":"pypdf","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/pypdf?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.0-1","6.9.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-pypdf","binary_version":"6.9.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102994.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}