CVE-2026-46529
Full vulnerability record from the local CVENow database.
Description
Atril Document Viewer is the default document reader of the MATE desktop environment for Linux. A single-click remote code execution vulnerability in versions prior to 1.26.3 and 1.28.4 allows an attacker to achieve arbitrary code execution as the user by tricking them into clicking a link inside a malicious PDF document. The PDF can be packaged as a polyglot file that is simultaneously a valid PDF and a valid ELF shared library, making the attack a single-file, single-click, configuration-independent RCE on stock atril installations. The root cause is `shell/ev-application.c:ev_spawn`, which builds a command line from attacker-controlled PDF link-destination fields without applying `g_shell_quote`. The cmdline is then handed to `g_app_info_create_from_commandline`, which shell-parses it back into argv — splitting any embedded `--gtk-module=PATH` into a separate argv element. GTK then `dlopen()`s the path during init, running any `__attribute__((constructor))` it finds. Versions 1.26.3 and 1.28.4 contain a patch for the issue. This is the same defect class as CVE-2023-51698 (CBT `--checkpoint-action` injection in `comics-document.c`, fixed in 1.6.2) but in a different code path (`shell/ev-application.c`) that the original patch did not touch.
Severity
HIGH
CVSS score
8.4
(v4.0)
Vulnerability status
Deferred
Source identifier
Published
2026-06-10 20:17:28.570000
Last modified
2026-10-26 11:10:00.157000
View original CVE JSON
{
"id": "CVE-2026-46529",
"sourceIdentifier": "[email protected]",
"published": "2026-06-10T20:17:28.570",
"lastModified": "2026-10-26T11:10:00.157",
"vulnStatus": "Deferred",
"cveTags": [],
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{
"lang": "en",
"value": "Atril Document Viewer is the default document reader of the MATE desktop environment for Linux. A single-click remote code execution vulnerability in versions prior to 1.26.3 and 1.28.4 allows an attacker to achieve arbitrary code execution as the user by tricking them into clicking a link inside a malicious PDF document. The PDF can be packaged as a polyglot file that is simultaneously a valid PDF and a valid ELF shared library, making the attack a single-file, single-click, configuration-independent RCE on stock atril installations. The root cause is `shell/ev-application.c:ev_spawn`, which builds a command line from attacker-controlled PDF link-destination fields without applying `g_shell_quote`. The cmdline is then handed to `g_app_info_create_from_commandline`, which shell-parses it back into argv — splitting any embedded `--gtk-module=PATH` into a separate argv element. GTK then `dlopen()`s the path during init, running any `__attribute__((constructor))` it finds. Versions 1.26.3 and 1.28.4 contain a patch for the issue. This is the same defect class as CVE-2023-51698 (CBT `--checkpoint-action` injection in `comics-document.c`, fixed in 1.6.2) but in a different code path (`shell/ev-application.c`) that the original patch did not touch."
},
{
"lang": "es",
"value": "Atril Document Viewer es el lector de documentos predeterminado del entorno de escritorio MATE para Linux. Una vulnerabilidad de ejecución remota de código de un solo clic en versiones anteriores a la 1.26.3 y 1.28.4 permite a un atacante lograr la ejecución de código arbitrario como el usuario engañándolos para que hagan clic en un enlace dentro de un documento PDF malicioso. El PDF puede empaquetarse como un archivo políglota que es simultáneamente un PDF válido y una biblioteca compartida ELF válida, haciendo del ataque una RCE de un solo archivo, un solo clic y configuración independiente en instalaciones de atril estándar. La causa raíz es ’shell/ev-application.c:ev_spawn’, que construye una línea de comandos a partir de campos de destino de enlace PDF controlados por el atacante sin aplicar ’g_shell_quote’. La línea de comandos se entrega luego a ’g_app_info_create_from_commandline’, que la analiza de nuevo en argv - dividiendo cualquier ’--gtk-module=PATH’ incrustado en un elemento argv separado. GTK luego ’dlopen()’ la ruta durante la inicialización, ejecutando cualquier ’__attribute__((constructor))’ que encuentre. Las versiones 1.26.3 y 1.28.4 contienen un parche para el problema. Esta es la misma clase de defecto que CVE-2023-51698 (inyección de CBT ’--checkpoint-action’ en ’comics-document.c’, corregido en 1.6.2) pero en una ruta de código diferente (’shell/ev-application.c’) que el parche original no tocó."
}
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"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
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"modifiedPrivilegesRequired": "NOT_DEFINED",
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