{"affected":[{"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-p423-j2cm-9vmq/GHSA-p423-j2cm-9vmq.json"},"package":{"ecosystem":"PyPI","name":"cryptography","purl":"pkg:pypi/cryptography"},"ranges":[{"events":[{"introduced":"45.0.0"},{"fixed":"46.0.7"}],"type":"ECOSYSTEM"}],"versions":["45.0.0","45.0.1","45.0.2","45.0.3","45.0.4","45.0.5","45.0.6","45.0.7","46.0.0","46.0.1","46.0.2","46.0.3","46.0.4","46.0.5","46.0.6"]}],"aliases":["CVE-2026-39892","PYSEC-2026-36"],"database_specific":{"cwe_ids":["CWE-119","CWE-131"],"github_reviewed":true,"github_reviewed_at":"2026-04-08T19:23:08Z","nvd_published_at":"2026-04-08T21:17:01Z","severity":"MODERATE"},"details":"If a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. `Hash.update()`), this could lead to buffer overflows. For example:\n\n```python\nh = Hash(SHA256())\nb.update(buf[::-1])\n```\n\nwould read past the end of the buffer on Python >3.11","id":"GHSA-p423-j2cm-9vmq","modified":"2026-11-04T03:30:50.401534783Z","published":"2026-04-08T19:23:08Z","references":[{"type":"WEB","url":"https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39892"},{"type":"WEB","url":"https://github.com/pyca/cryptography/commit/c09d38ae52de7d95fe683b7a7c496f5751616f27"},{"type":"WEB","url":"https://github.com/pyca/cryptography/commit/622d672e429a7cff836a23c5903683dbec1901f5"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43651"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43670"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43851"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43853"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43854"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:43855"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:46956"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:7295"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-39892"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2456735"},{"type":"PACKAGE","url":"https://github.com/pyca/cryptography"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2026-36.yaml"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39892.json"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:19375"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:20338"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:21017"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:22465"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:22629"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:22840"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:23361"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24483"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24761"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24762"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24853"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24866"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:24977"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:30088"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:30089"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37275"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:42644"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/08/12"}],"schema_version":"1.9.2","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","type":"CVSS_V4"}],"summary":"Cryptography vulnerable to buffer overflow if non-contiguous buffers were passed to APIs"}