{ "document": { "aggregate_severity": { "text": "Critical" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/almalinux9.2esu/vex/2026/cve-2026-27459-els_os-almalinux9_2esu.json" } ], "tracking": { "current_release_date": "2026-05-06T19:48:36Z", "generator": { "date": "2026-05-06T19:48:36Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-27459-ELS_OS-ALMALINUX9.2ESU", "initial_release_date": "2026-03-18T00:16:00Z", "revision_history": [ { "date": "2026-03-18T00:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-05-06T19:48:36Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-27459" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "AlmaLinux 9.2", "product": { "name": "AlmaLinux 9.2", "product_id": "AlmaLinux-9.2", "product_identification_helper": { "cpe": "cpe:2.3:o:almalinux:almalinux:9.2:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "AlmaLinux" } ], "category": "vendor", "name": "AlmaLinux OS Foundation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch", "product": { "name": "python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch", "product_id": "python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/python3-pyOpenSSL@21.0.0-1.el9.tuxcare.els1?arch=noarch" } } }, { "category": "product_version", "name": "pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "product": { "name": "pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "product_id": "pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/pyOpenSSL-doc@21.0.0-1.el9.tuxcare.els1?arch=noarch" } } } ], "category": "architecture", "name": "noarch" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.2", "product_id": "AlmaLinux-9.2:python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch" }, "product_reference": "python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.2" }, { "category": "default_component_of", "full_product_name": { "name": "pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.2", "product_id": "AlmaLinux-9.2:pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch" }, "product_reference": "pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.2" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27459", "cwe": { "id": "CWE-120", "name": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')" }, "notes": [ { "category": "description", "text": "pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are too long are now rejected.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "AlmaLinux-9.2:pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.2:python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-27459" }, { "category": "external", "summary": "https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst", "url": "https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst" }, { "category": "external", "summary": "https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408", "url": "https://github.com/pyca/pyopenssl/commit/57f09bb4bb051d3bc2a1abd36e9525313d5cd408" }, { "category": "external", "summary": "https://github.com/pyca/pyopenssl/security/advisories/GHSA-5pwr-322w-8jr4", "url": "https://github.com/pyca/pyopenssl/security/advisories/GHSA-5pwr-322w-8jr4" } ], "release_date": "2026-03-18T00:16:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "AlmaLinux-9.2:pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.2:python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch" ] } ], "threats": [ { "category": "impact", "details": "Critical" }, { "category": "impact", "details": "critical", "product_ids": [ "AlmaLinux-9.2:pyOpenSSL-doc-0:21.0.0-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.2:python3-pyOpenSSL-0:21.0.0-1.el9.tuxcare.els1.noarch" ] } ] } ] }