{"answers":{"affected":"It affects 4 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3833 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-3833 is a medium-severity vulnerability in Gnu Gnutls, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-3833 and fix it if it is affected.\n\nWhat it is: CVE-2026-3833 is a medium-severity vulnerability in Gnu Gnutls, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3833 exists.\n\nAffected product: Gnu Gnutls. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-3833/ (Markdown: https://insights.sbomify.com/CVE-2026-3833/index.md)","id":"CVE-2026-3833","markdown":"https://insights.sbomify.com/CVE-2026-3833/index.md","name":"CVE-2026-3833","record":{"aliases":["ALPINE-CVE-2026-3833","BELL-CVE-2026-3833","CLSA-2026-1778832314","CLSA-2026-1778835563","CLSA-2026-1778839424","CLSA-2026-1779107085","CLSA-2026-1779120347","CLSA-2026-1779120390","CLSA-2026-1779180457","CLSA-2026-1779355433","CLSA-2026-1779355613","CLSA-2026-1779827686","CLSA-2026-1779963183","DEBIAN-CVE-2026-3833","ECHO-eaab-3ed4-9bfd","GHSA-6rgh-57xm-37v8"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["security_bypass","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"GnuTLS library","requires_auth":"none","summary":"Attackers can bypass certificate name constraints by exploiting case-sensitive comparisons in GnuTLS, leading to unauthorized access or information disclosure.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"gnutls","vendor":"gnu"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"hardened_images","vendor":"redhat"},{"product":"openshift_container_platform","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-178","name":"Improper Handling of Case Sensitivity"}],"description":"A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `nameConstraints` labels, specifically for `dNSName` (DNS) or `rfc822Name` (email) constraints within `excludedSubtrees` or `permittedSubtrees`. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison","id":"CVE-2026-3833","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"gnu:gnutls","products":["gnu:gnutls","redhat:enterprise_linux","redhat:hardened_images","redhat:openshift_container_platform"],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":35,"next":{"headline":"Prevent Direct Access – Protect WordPress Files \u003c= 2.8.8.8 - Unauthenticated Protected File Access","id":"CVE-2026-3835"},"packages":[],"prev":{"headline":"Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response","id":"CVE-2026-3832"},"products":["Cert Manager support for Red Hat OpenShift release 1.17","Cert Manager support for Red Hat OpenShift release 1.18","Cert Manager support for Red Hat OpenShift release 1.20","Red Hat Discovery 2","Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7 Extended Lifecycle Support","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.8 Telecommunications Update Service","Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.6 Extended Update Support","Red Hat Hardened Images","Red Hat OpenShift AI 3.4","Red Hat OpenShift Container Platform 4","Red Hat OpenShift Container Platform 4.12","Red Hat OpenShift Container Platform 4.13","Red Hat OpenShift Container Platform 4.14","Red Hat OpenShift Container Platform 4.15","Red Hat OpenShift Container Platform 4.16","Red Hat OpenShift Container Platform 4.17","Red Hat OpenShift Container Platform 4.18","Red Hat OpenShift Container Platform 4.19","Red Hat Update Infrastructure 5"],"published":"2026-04-30","related":[{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2008-1948","kev_date_added":null,"published":"2008-05-21"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2017-5334","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-5336","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-5337","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.3,"headline":"Null dereference in n/a","id":"CVE-2008-1949","kev_date_added":null,"published":"2008-05-21"},{"cvss_score":7.8,"headline":"Denial of service in n/a","id":"CVE-2004-2531","kev_date_added":null,"published":"2005-10-25"},{"cvss_score":7.6,"headline":"Use after free in n/a","id":"CVE-2008-2377","kev_date_added":null,"published":"2008-08-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["Red Hat"]},"summary":"Attackers can bypass certificate name constraints by exploiting case-sensitive comparisons in GnuTLS, leading to unauthorized access or information disclosure.","url":"https://insights.sbomify.com/CVE-2026-3833/"}