{"answers":{"affected":"3 open source packages ship an affected version, including pyopenssl. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27448 in the wild and no public exploit code.","fix":"Upgrade pyopenssl to 26.0.0 or later.","what":"CVE-2026-27448 is a low-severity vulnerability in pyca pyopenssl, published on 17 Mar 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-2026-27448 and fix it if it is affected.\n\nWhat it is: CVE-2026-27448 is a low-severity vulnerability in pyca pyopenssl, published on 17 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-27448 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pyopenssl (PyPI): affected from 0.14; fixed in 26.0.0\n- pyopenssl (PyPI): affected from 0.14.0; fixed in 26.0.0\n- pyopenssl (PyPI): affected from 0.14.0; fixed in 26.0.0\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-2026-27448/ (Markdown: https://insights.sbomify.com/CVE-2026-27448/index.md)","id":"CVE-2026-27448","markdown":"https://insights.sbomify.com/CVE-2026-27448/index.md","name":"CVE-2026-27448","record":{"aliases":["AZL-80031","BELL-CVE-2026-27448","CLEANSTART-2026-FW34040","CLEANSTART-2026-KN51802","CLSA-2026-1776098295","CLSA-2026-1779181743","DEBIAN-CVE-2026-27448","ECHO-e106-5b29-8a6f","GHSA-vp96-hxj8-p424","MINI-7c2v-mw6g-qc7x","MINI-8cwf-jvr9-x4p2","MINI-c99x-fg92-c54q","MINI-h55p-fggr-8qm3","MINI-m573-8pgp-hqvh","MINI-p5pq-f5v5-pprm","MINI-vc69-jh75-c4p2","OESA-2026-1732","OESA-2026-1733","PYSEC-2026-2268","ROOT-APP-PYPI-CVE-2026-27448","SUSE-SU-2026:1416-1","SUSE-SU-2026:1582-1","SUSE-SU-2026:3424-1","UBUNTU-CVE-2026-27448","USN-8335-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Python TLS library","requires_auth":"none","summary":"Attackers can bypass TLS security checks if a custom server name callback raises an unhandled exception, allowing unauthorized connections.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pyopenssl","vendor":"pyopenssl"}],"cvss":{"score":1.7,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U","version":"4.0"},"cwes":[{"id":"CWE-636","name":"Not Failing Securely"}],"description":"pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Starting in version 26.0.0, unhandled exceptions now result in rejecting the connection.","ecosystems":["PyPI","SUSE:Linux Enterprise Micro 5.2","SUSE:Linux Enterprise Micro 5.3","SUSE:Linux Enterprise Micro 5.4","SUSE:Linux Enterprise Micro 5.5","SUSE:Linux Enterprise Module for Basesystem 15 SP7","SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback","id":"CVE-2026-27448","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":9,"n_references":3,"next":{"headline":"Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints","id":"CVE-2026-27449"},"packages":[{"ecosystem":"PyPI","fixed":["26.0.0"],"introduced":["0.14"],"last_affected":[],"package":"pyopenssl","purl":"pkg:pypi/pyopenssl","source":"PYSEC-2026-2268"},{"ecosystem":"PyPI","fixed":["26.0.0"],"introduced":["0.14.0"],"last_affected":[],"package":"pyopenssl","purl":null,"source":"GHSA-vp96-hxj8-p424"},{"ecosystem":"PyPI","fixed":["26.0.0"],"introduced":["0.14.0"],"last_affected":[],"package":"pyopenssl","purl":"pkg:pypi/pyopenssl","source":"GHSA-vp96-hxj8-p424"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.2","fixed":["19.0.0-150300.3.3.1"],"introduced":["0"],"last_affected":[],"package":"python-pyOpenSSL","purl":"pkg:rpm/suse/python-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.2","source":"SUSE-SU-2026:1416-1"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.3","fixed":["21.0.0-150400.22.1"],"introduced":["0"],"last_affected":[],"package":"python3-pyOpenSSL","purl":"pkg:rpm/suse/python3-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.3","source":"SUSE-SU-2026:3424-1"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.4","fixed":["21.0.0-150400.22.1"],"introduced":["0"],"last_affected":[],"package":"python3-pyOpenSSL","purl":"pkg:rpm/suse/python3-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.4","source":"SUSE-SU-2026:3424-1"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.5","fixed":["21.0.0-150400.22.1"],"introduced":["0"],"last_affected":[],"package":"python3-pyOpenSSL","purl":"pkg:rpm/suse/python3-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.5","source":"SUSE-SU-2026:3424-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","fixed":["21.0.0-150400.22.1"],"introduced":["0"],"last_affected":[],"package":"python3-pyOpenSSL","purl":"pkg:rpm/suse/python3-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7","source":"SUSE-SU-2026:3424-1"},{"ecosystem":"SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","fixed":["17.1.0-4.32.1"],"introduced":["0"],"last_affected":[],"package":"python-pyOpenSSL","purl":"pkg:rpm/suse/python-pyOpenSSL\u0026distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5","source":"SUSE-SU-2026:1582-1"}],"prev":{"headline":"OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup","id":"CVE-2026-27447"},"products":["pyopenssl"],"published":"2026-03-17","related":[{"cvss_score":7.2,"headline":"pyOpenSSL DTLS cookie callback buffer overflow","id":"CVE-2026-27459","kev_date_added":null,"published":"2026-03-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-18","vendors":["pyca"]},"summary":"Attackers can bypass TLS security checks if a custom server name callback raises an unhandled exception, allowing unauthorized connections.","url":"https://insights.sbomify.com/CVE-2026-27448/"}