{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-26970 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-26970 is a high-severity memory corruption vulnerability in Mozilla Thunderbird, published on 9 Dec 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-2020-26970 and fix it if it is affected.\n\nWhat it is: CVE-2020-26970 is a high-severity memory corruption vulnerability in Mozilla Thunderbird, published on 9 Dec 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-2020-26970 in the wild and no public exploit code.\n\nAffected product: Mozilla Thunderbird. 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-2020-26970/ (Markdown: https://insights.sbomify.com/CVE-2020-26970/index.md)","id":"CVE-2020-26970","markdown":"https://insights.sbomify.com/CVE-2020-26970/index.md","name":"CVE-2020-26970","record":{"aliases":["DEBIAN-CVE-2020-26970","DLA-2479-1","DSA-4802-1","GHSA-w8wp-h42w-f3m4","MGASA-2020-0450","RHSA-2020:5398","RHSA-2020:5399","RHSA-2020:5400","SUSE-SU-2020:3642-1","UBUNTU-CVE-2020-26970"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Thunderbird email client","requires_auth":"none","summary":"Stack corruption in Thunderbird's SMTP status code handling allows potential arbitrary code execution via crafted server responses.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mozilla","cpe":[{"product":"thunderbird","vendor":"mozilla"}],"cvss":{"score":8.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. This vulnerability affects Thunderbird \u003c 78.5.1.","ecosystems":["Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:enterprise_linux:8::appstream","Red Hat:rhel_eus:8.2::appstream","SUSE:Linux Enterprise Workstation Extension 15 SP1"],"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":"Memory corruption in Thunderbird","id":"CVE-2020-26970","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"mozilla:thunderbird","products":["mozilla:thunderbird"],"type":"memory_corruption","year":"2020"},"n_packages":13,"n_references":2,"next":{"headline":"Memory corruption in Firefox","id":"CVE-2020-26971"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird","purl":"pkg:rpm/redhat/thunderbird","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debuginfo","purl":"pkg:rpm/redhat/thunderbird-debuginfo","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird","purl":"pkg:rpm/redhat/thunderbird","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debuginfo","purl":"pkg:rpm/redhat/thunderbird-debuginfo","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird","purl":"pkg:rpm/redhat/thunderbird","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:78.5.1-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debuginfo","purl":"pkg:rpm/redhat/thunderbird-debuginfo","source":"RHSA-2020:5400"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:78.5.1-1.el8_3"],"introduced":["0"],"last_affected":[],"package":"thunderbird","purl":"pkg:rpm/redhat/thunderbird","source":"RHSA-2020:5398"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:78.5.1-1.el8_3"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debuginfo","purl":"pkg:rpm/redhat/thunderbird-debuginfo","source":"RHSA-2020:5398"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:78.5.1-1.el8_3"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debugsource","purl":"pkg:rpm/redhat/thunderbird-debugsource","source":"RHSA-2020:5398"},{"ecosystem":"Red Hat:rhel_eus:8.2::appstream","fixed":["0:78.5.1-1.el8_2"],"introduced":["0"],"last_affected":[],"package":"thunderbird","purl":"pkg:rpm/redhat/thunderbird","source":"RHSA-2020:5399"},{"ecosystem":"Red Hat:rhel_eus:8.2::appstream","fixed":["0:78.5.1-1.el8_2"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debuginfo","purl":"pkg:rpm/redhat/thunderbird-debuginfo","source":"RHSA-2020:5399"},{"ecosystem":"Red Hat:rhel_eus:8.2::appstream","fixed":["0:78.5.1-1.el8_2"],"introduced":["0"],"last_affected":[],"package":"thunderbird-debugsource","purl":"pkg:rpm/redhat/thunderbird-debugsource","source":"RHSA-2020:5399"},{"ecosystem":"SUSE:Linux Enterprise Workstation Extension 15 SP1","fixed":["78.5.1-3.110.2"],"introduced":["0"],"last_affected":[],"package":"MozillaThunderbird","purl":"pkg:rpm/suse/MozillaThunderbird\u0026distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1","source":"SUSE-SU-2020:3642-1"}],"prev":{"headline":"Memory corruption in Firefox","id":"CVE-2020-26969"},"products":["Thunderbird"],"published":"2020-12-09","related":[{"cvss_score":9.8,"headline":"Ambiguous parsing of mail headers","id":"CVE-2026-92238","kev_date_added":null,"published":"2026-09-15"},{"cvss_score":9.8,"headline":"Calendar invitation attachments could launch local executables","id":"CVE-2026-84637","kev_date_added":null,"published":"2026-09-01"},{"cvss_score":9.8,"headline":"Memory corruption in Thunderbird","id":"CVE-2021-43529","kev_date_added":null,"published":"2023-02-16"},{"cvss_score":9.8,"headline":"Memory corruption in Thunderbird","id":"CVE-2019-11703","kev_date_added":null,"published":"2019-07-23"},{"cvss_score":9.8,"headline":"Memory corruption in Thunderbird","id":"CVE-2019-11704","kev_date_added":null,"published":"2019-07-23"},{"cvss_score":9.8,"headline":"Memory corruption in Thunderbird","id":"CVE-2019-11705","kev_date_added":null,"published":"2019-07-23"},{"cvss_score":9.8,"headline":"Use after free in Thunderbird","id":"CVE-2018-18512","kev_date_added":null,"published":"2019-04-26"}],"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":"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["Mozilla"]},"summary":"Stack corruption in Thunderbird's SMTP status code handling allows potential arbitrary code execution via crafted server responses.","url":"https://insights.sbomify.com/CVE-2020-26970/"}