{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"CRITICAL" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0818" }, { "summary":"CVE-2026-0818 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-0818.json" }, { "summary":"openEuler-SA-2026-1539", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1539" }, { "summary":"CVE-2026-0818", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-0818&packageName=thunderbird" } ], "title":"openEuler cve CVE-2026-0818", "tracking":{ "initial_release_date":"2026-03-09T15:11:12+08:00", "revision_history":[ { "date":"2026-03-09T15:11:12+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-03-09T15:11:12+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-03-09T15:11:12+08:00", "id":"CVE-2026-0818", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"openEuler-24.03-LTS-SP2", "name":"openEuler-24.03-LTS-SP2" }, "name":"openEuler-24.03-LTS-SP2", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"thunderbird-140.8.0-1.oe2403sp2.aarch64.rpm", "name":"thunderbird-140.8.0-1.oe2403sp2.aarch64.rpm" }, "name":"thunderbird-140.8.0-1.oe2403sp2.aarch64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, 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"product_id":"openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.x86_64", "name":"thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.x86_64 as a component of openEuler-24.03-LTS-SP2" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP2", "product_reference":"thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64", "name":"thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64 as a component of openEuler-24.03-LTS-SP2" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-0818", "notes":[ { "text":"When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.src", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64" ] }, "remediations":[ { "product_ids":[ "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.src", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64" ], "details":"thunderbird security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1539" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":4.3, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "version":"3.1" }, "products":[ "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.src", "openEuler-24.03-LTS-SP2:thunderbird-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debuginfo-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-debugsource-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-librnp-rnp-140.8.0-1.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:thunderbird-wayland-140.8.0-1.oe2403sp2.x86_64" ] } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-0818" } ] }