{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-26117 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-26117 is a high-severity vulnerability in Debian Debian Linux, published on 27 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-26117 and fix it if it is affected.\n\nWhat it is: CVE-2020-26117 is a high-severity vulnerability in Debian Debian Linux, published on 27 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-26117 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2020-26117/ (Markdown: https://insights.sbomify.com/CVE-2020-26117/index.md)","id":"CVE-2020-26117","markdown":"https://insights.sbomify.com/CVE-2020-26117/index.md","name":"CVE-2020-26117","record":{"aliases":["DEBIAN-CVE-2020-26117","DLA-2396-1","GHSA-cx25-8g49-fx7q","MGASA-2020-0388","RHSA-2021:1783","RLSA-2021:1783","SUSE-SU-2020:2880-1","SUSE-SU-2020:2881-1","SUSE-SU-2020:2882-1","SUSE-SU-2020:2898-1","UBUNTU-CVE-2020-26117","USN-5965-1","openSUSE-SU-2020:1666-1","openSUSE-SU-2020:1841-1"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"TigerVNC viewer","requires_auth":"none","summary":"TigerVNC viewers mishandle TLS certificate exceptions, allowing certificate owners to impersonate servers after a user adds an exception.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"leap","vendor":"opensuse"},{"product":"tigervnc","vendor":"tigervnc"}],"cvss":{"score":8.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.","ecosystems":["Red Hat:enterprise_linux:8::appstream","Rocky Linux:8","SUSE:Enterprise Storage 5","SUSE:HPE Helion OpenStack 8","SUSE:Linux Enterprise High Performance Computing 15-ESPOS","SUSE:Linux Enterprise High Performance Computing 15-LTSS","SUSE:Linux Enterprise Module for Basesystem 15 SP1","SUSE:Linux Enterprise Module for Basesystem 15 SP2","SUSE:Linux Enterprise Module for Desktop Applications 15 SP1","SUSE:Linux Enterprise Module for Desktop Applications 15 SP2","SUSE:Linux Enterprise Server 12 SP2-BCL","SUSE:Linux Enterprise Server 12 SP2-LTSS","SUSE:Linux Enterprise Server 12 SP3-BCL","SUSE:Linux Enterprise Server 12 SP3-LTSS","SUSE:Linux Enterprise Server 12 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server 15-LTSS","SUSE:Linux Enterprise Server for SAP Applications 12 SP2","SUSE:Linux Enterprise Server for SAP Applications 12 SP3","SUSE:Linux Enterprise Server for SAP Applications 12 SP4","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15","SUSE:OpenStack Cloud 7","SUSE:OpenStack Cloud 8","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.1","openSUSE:Leap 15.2"],"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":"Security feature bypass in n/a","id":"CVE-2020-26117","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","opensuse:leap"],"type":"security_feature_bypass","year":"2020"},"n_packages":40,"n_references":9,"next":{"headline":"Deserialization in n/a","id":"CVE-2020-26118"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/redhat/tigervnc","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-debuginfo","purl":"pkg:rpm/redhat/tigervnc-debuginfo","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-debugsource","purl":"pkg:rpm/redhat/tigervnc-debugsource","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-icons","purl":"pkg:rpm/redhat/tigervnc-icons","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-license","purl":"pkg:rpm/redhat/tigervnc-license","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-selinux","purl":"pkg:rpm/redhat/tigervnc-selinux","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server","purl":"pkg:rpm/redhat/tigervnc-server","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server-debuginfo","purl":"pkg:rpm/redhat/tigervnc-server-debuginfo","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server-minimal","purl":"pkg:rpm/redhat/tigervnc-server-minimal","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server-minimal-debuginfo","purl":"pkg:rpm/redhat/tigervnc-server-minimal-debuginfo","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server-module","purl":"pkg:rpm/redhat/tigervnc-server-module","source":"RHSA-2021:1783"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc-server-module-debuginfo","purl":"pkg:rpm/redhat/tigervnc-server-module-debuginfo","source":"RHSA-2021:1783"},{"ecosystem":"Rocky Linux:8","fixed":["0:1.11.0-6.el8"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/rocky-linux/tigervnc?distro=rocky-linux-8-4-legacy\u0026epoch=0","source":"RLSA-2021:1783"},{"ecosystem":"SUSE:Enterprise Storage 5","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Enterprise%20Storage%205","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:HPE Helion OpenStack 8","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=HPE%20Helion%20OpenStack%208","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-ESPOS","fixed":["1.8.0-13.14.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS","source":"SUSE-SU-2020:2882-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-LTSS","fixed":["1.8.0-13.14.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS","source":"SUSE-SU-2020:2882-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP1","fixed":["1.9.0-19.9.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1","source":"SUSE-SU-2020:2880-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","fixed":["1.9.0-19.9.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2","source":"SUSE-SU-2020:2880-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP1","fixed":["1.9.0-19.9.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1","source":"SUSE-SU-2020:2880-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP2","fixed":["1.9.0-19.9.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2","source":"SUSE-SU-2020:2880-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP2-BCL","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP2-LTSS","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-BCL","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-LTSS","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15-LTSS","fixed":["1.8.0-13.14.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS","source":"SUSE-SU-2020:2882-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP2","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP3","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15","fixed":["1.8.0-13.14.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015","source":"SUSE-SU-2020:2882-1"},{"ecosystem":"SUSE:OpenStack Cloud 7","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20OpenStack%20Cloud%207","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:OpenStack Cloud 8","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20OpenStack%20Cloud%208","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:OpenStack Cloud 9","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20OpenStack%20Cloud%209","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 8","fixed":["1.6.0-27.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%208","source":"SUSE-SU-2020:2898-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["1.6.0-22.17.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/suse/tigervnc\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2020:2881-1"},{"ecosystem":"openSUSE:Leap 15.1","fixed":["1.9.0-lp151.4.9.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/opensuse/tigervnc\u0026distro=openSUSE%20Leap%2015.1","source":"openSUSE-SU-2020:1841-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["1.9.0-lp152.7.3.1"],"introduced":["0"],"last_affected":[],"package":"tigervnc","purl":"pkg:rpm/opensuse/tigervnc\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2020:1666-1"}],"prev":{"headline":"Other in n/a","id":"CVE-2020-26116"},"products":["n/a"],"published":"2020-09-27","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"TigerVNC viewers mishandle TLS certificate exceptions, allowing certificate owners to impersonate servers after a user adds an exception.","url":"https://insights.sbomify.com/CVE-2020-26117/"}