{"id":"CVE-2026-5260","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-5260","generatedAt":"2026-10-27T23:57:43.884Z","title":"A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread.","description":"A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.","published":"2026-05-26T22:16:44.000Z","lastModified":"2026-10-22T21:17:20.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},"cwe":["CWE-126"],"affected":[],"epss":{"score":0.00769,"percentile":0.55323,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.77%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:13274","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20611","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20612","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20613","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:26319","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:26409","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:29197","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30004","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30849","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30850","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:32962","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:33125","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:40762","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:41921","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:56853","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:57483","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:58981","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:59831","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60019","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67837","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72502","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:74674","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:77320","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82304","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82322","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82347","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82354","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82372","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82811","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82857","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82888","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5260","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467450","source":"secalert@redhat.com"},{"url":"https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-5260","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}