{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-46529: PDF /GoToR action argv injection enables single-click RCE via --gtk-module dlopen","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-46529","status":"final","version":"1","initial_release_date":"2026-06-10T19:46:23.639Z","current_release_date":"2026-06-12T12:30:51.506Z","revision_history":[{"date":"2026-06-10T19:46:23.639Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-46529 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-46529"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-46529"},{"category":"external","summary":"https://github.com/mate-desktop/atril/security/advisories/GHSA-vgv2-m826-8f6f","url":"https://github.com/mate-desktop/atril/security/advisories/GHSA-vgv2-m826-8f6f"},{"category":"external","summary":"https://github.com/mate-desktop/atril/releases/tag/v1.26.3","url":"https://github.com/mate-desktop/atril/releases/tag/v1.26.3"},{"category":"external","summary":"https://github.com/mate-desktop/atril/releases/tag/v1.28.4","url":"https://github.com/mate-desktop/atril/releases/tag/v1.28.4"}]},"product_tree":{"branches":[{"category":"vendor","name":"mate-desktop","branches":[{"category":"product_name","name":"atril","branches":[{"category":"product_version","name":"< 1.26.3","product":{"name":"mate-desktop atril < 1.26.3","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:mate-desktop:atril:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":">= 1.27.0, < 1.28.4","product":{"name":"mate-desktop atril >= 1.27.0, < 1.28.4","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:mate-desktop:atril:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-46529","title":"PDF /GoToR action argv injection enables single-click RCE via --gtk-module dlopen","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.4,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1","CSAFPID-2"]}]}]}