{"id":"CVE-2026-5260","title":"A flaw was found in libgnutls","summary":"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 corrupti…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","cwe":["CWE-126"],"vendor":"Red Hat","product":"gnutls","affected":["gnutls all versions","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","libtasn1 (all versions)","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","gnutls (all versions)","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","cert-manager/jetstack-cert-manager-acmesolver-rhel9 (all versions)","cert-manager/jetstack-cert-manager-rhel9 (all versions)","cert-manager/cert-manager-operator-rhel9 (all versions)","cert-manager/cert-manager-operator-bundle (all versions)","cert-manager/jetstack-cert-manager-acmesolver-rhel9 (all versions)","cert-manager/jetstack-cert-manager-rhel9 (all versions)","cert-manager/cert-manager-istio-csr-rhel9 (all versions)","cert-manager/cert-manager-operator-rhel9 (all versions)","cert-manager/cert-manager-operator-bundle (all versions)","cert-manager/cert-manager-trust-manager-rhel9 (all versions)","discovery/discovery-server-rhel9 (all versions)","discovery/discovery-ui-rhel9 (all versions)","gnutls-main (all versions)","rhai/base-image-neuron-rhel9 (all versions)","rhui5/cds-rhel9 (all versions)","rhui5/haproxy-rhel9 (all versions)","rhui5/installer-rhel9 (all versions)","rhui5/rhua-rhel9 (all versions)","rhui5/cds-kubernetes-tp-rhel9 (all versions)","rhui5/installer-tp-rhel9 (all versions)","rhui5/rhua-tp-rhel9 (all versions)"],"patched":["openshift_container_platform 4.12","openshift_container_platform 4.14","openshift_container_platform 4.16","openshift_container_platform 4.17","openshift_container_platform 4.18","openshift_container_platform 4.19","enterprise_linux_appstream_eus_v_10_0","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_aus_v_8_4","enterprise_linux_appstream_eus_extension_v_8_4","enterprise_linux_appstream_aus_v_8_6","enterprise_linux_appstream_eus_extension_v_8_6","enterprise_linux_appstream_e4s_v_8_8","enterprise_linux_appstream_tus_v_8_8","enterprise_linux_appstream_e4s_v_9_2","enterprise_linux_appstream_e4s_v_9_4","enterprise_linux_appstream_eus_v_9_6","enterprise_linux_appstream_v_9","enterprise_linux_baseos_eus_v_10_0","enterprise_linux_baseos_v_10","enterprise_linux_baseos_v_8","enterprise_linux_baseos_aus_v_8_4","enterprise_linux_baseos_eus_extension_v_8_4","enterprise_linux_baseos_aus_v_8_6","enterprise_linux_baseos_eus_extension_v_8_6","enterprise_linux_baseos_e4s_v_8_8","enterprise_linux_baseos_tus_v_8_8","enterprise_linux_baseos_e4s_v_9_2","enterprise_linux_baseos_e4s_v_9_4","enterprise_linux_baseos_eus_v_9_6","enterprise_linux_baseos_v_9","discovery 2","hardened_images","update_infrastructure 5"],"published":"2026-05-26","updated":"2026-10-15","sourceUpdated":"2026-10-15T17:17:25.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-5260","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:13274","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20611","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20612","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:20613","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:26319","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:26409","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:29197","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30004","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30849","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:30850","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:32962","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:33125","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:40762","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:41921","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:56853","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:57483","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:58981","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:59831","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:60019","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:67837","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72502","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:74674","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:77320","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82304","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82322","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82347","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82354","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82372","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82857","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82888","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5260","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467450","label":"secalert@redhat.com"},{"url":"https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5260.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5260"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5260"},{"url":"https://access.redhat.com/errata/RHSA-2026:82811","label":"RHSA-2026:82811"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-05-27T13:36:46.793551Z"},"epss":0.00769,"epssPercentile":0.55391,"ingestedAt":"2026-06-29T13:42:11.964Z","slug":"CVE-2026-5260","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:59831** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:59831)\n- **RHSA-2026:67837** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:67837)\n- **RHSA-2026:56853** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56853)\n- **RHSA-2026:60019** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:60019)\n- **RHSA-2026:57483** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:57483)\n- **RHSA-2026:40762** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-07-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:40762)\n- **RHSA-2026:26409** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · released 2026-06-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:26409)\n- **RHSA-2026:20613** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:20613)\n- **RHSA-2026:20611** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8) · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:20611)\n- **RHSA-2026:33125** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · released 2026-06-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:33125)\n- **RHSA-2026:30849** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6), Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) · released 2026-06-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:30849)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5260.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}