{"schema_version":"1.7.2","id":"OESA-2026-1994","modified":"2026-04-17T13:04:39Z","published":"2026-04-17T13:04:39Z","upstream":["CVE-2025-59375","CVE-2026-3889","CVE-2026-4371","CVE-2026-4684","CVE-2026-4685","CVE-2026-4686","CVE-2026-4687","CVE-2026-4688","CVE-2026-4689","CVE-2026-4690","CVE-2026-4691","CVE-2026-4692","CVE-2026-4693","CVE-2026-4694","CVE-2026-4695","CVE-2026-4696","CVE-2026-4697","CVE-2026-4698","CVE-2026-4699","CVE-2026-4700","CVE-2026-4701","CVE-2026-4702","CVE-2026-4704","CVE-2026-4705","CVE-2026-4706","CVE-2026-4707","CVE-2026-4708","CVE-2026-4709","CVE-2026-4710","CVE-2026-4711","CVE-2026-4712","CVE-2026-4713","CVE-2026-4714","CVE-2026-4715","CVE-2026-4716","CVE-2026-4717","CVE-2026-4718","CVE-2026-4719","CVE-2026-4720","CVE-2026-4721"],"summary":"thunderbird security update","details":"Mozilla Thunderbird is a standalone mail and newsgroup client.\r\n\r\nSecurity Fix(es):\n\nlibexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.(CVE-2025-59375)\n\nSpoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.(CVE-2026-3889)\n\nA malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.(CVE-2026-4371)\n\nRace condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4684)\n\nIncorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4685)\n\nIncorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4686)\n\nSandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4687)\n\nSandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4688)\n\nSandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4689)\n\nSandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.(CVE-2026-4690)\n\nUse-after-free in the CSS Parsing and Computation component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4691)\n\nSandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.(CVE-2026-4692)\n\nIncorrect boundary conditions in the Audio/Video: Playback component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4693)\n\nIncorrect boundary conditions, integer overflow in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.(CVE-2026-4694)\n\nIncorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4695)\n\nUse-after-free in the Layout: Text and Fonts component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4696)\n\nIncorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4697)\n\nJIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4698)\n\nIncorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4699)\n\nMitigation bypass in the Networking: HTTP component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4700)\n\nUse-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4701)\n\nJIT miscompilation in the JavaScript Engine component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4702)\n\nDenial-of-service in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4704)\n\nUndefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4705)\n\nIncorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4706)\n\nIncorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4707)\n\nIncorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4708)\n\nIncorrect boundary conditions in the Audio/Video: GMP component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4709)\n\nIncorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4710)\n\nUse-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4711)\n\nInformation disclosure in the Widget: Cocoa component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4712)\n\nIncorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4713)\n\nIncorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4714)\n\nUninitialized memory in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4715)\n\nIncorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4716)\n\nPrivilege escalation in the Netmonitor component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4717)\n\nUndefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4718)\n\nIncorrect boundary conditions in the Graphics: Text component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.(CVE-2026-4719)\n\nMemory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.(CVE-2026-4720)\n\nMemory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.(CVE-2026-4721)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"thunderbird","purl":"pkg:rpm/openEuler/thunderbird&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.9.1-1.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["thunderbird-140.9.1-1.oe2403sp3.aarch64.rpm","thunderbird-debuginfo-140.9.1-1.oe2403sp3.aarch64.rpm","thunderbird-debugsource-140.9.1-1.oe2403sp3.aarch64.rpm","thunderbird-librnp-rnp-140.9.1-1.oe2403sp3.aarch64.rpm","thunderbird-wayland-140.9.1-1.oe2403sp3.aarch64.rpm"],"src":["thunderbird-140.9.1-1.oe2403sp3.src.rpm"],"x86_64":["thunderbird-140.9.1-1.oe2403sp3.x86_64.rpm","thunderbird-debuginfo-140.9.1-1.oe2403sp3.x86_64.rpm","thunderbird-debugsource-140.9.1-1.oe2403sp3.x86_64.rpm","thunderbird-librnp-rnp-140.9.1-1.oe2403sp3.x86_64.rpm","thunderbird-wayland-140.9.1-1.oe2403sp3.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1994"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59375"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3889"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4371"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4684"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4685"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4686"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4687"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4688"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4689"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4690"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4691"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4692"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4693"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4694"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4695"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4696"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4697"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4698"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4699"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4700"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4701"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4702"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4704"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4705"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4706"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4707"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4708"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4709"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4710"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4711"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4712"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4713"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4714"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4715"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4716"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4717"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4718"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4719"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4720"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4721"}],"database_specific":{"severity":"Critical"}}