PDF /GoToR action argv injection enables single-click RCE via –gtk-module dlopen_CVE-2026-46529

{
    "lastseen": "",
    "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 \u2014 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.",
    "published": "2026-06-10T19:46:23.639Z",
    "modified": "2026-06-10T19:51:50.836Z",
    "type": "cve",
    "title": "PDF /GoToR action argv injection enables single-click RCE via --gtk-module dlopen",
    "source": "GitHub_M",
    "references": "https://github.com/mate-desktop/atril/security/advisories/GHSA-vgv2-m826-8f6f\nhttps://github.com/mate-desktop/atril/releases/tag/v1.26.3\nhttps://github.com/mate-desktop/atril/releases/tag/v1.28.4",
    "id": "CVE-2026-46529",
    "bulletinFamily": "",
    "cwe": [
        "CWE-77",
        "CWE-88",
        "CWE-829"
    ],
    "cvelist": null,
    "sourceData": "mate-desktop atril < 1.26.3\nmate-desktop atril >= 1.27.0, < 1.28.4",
    "sourceHref": "",
    "cvss": {
        "score": 8.4,
        "severity": "HIGH",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "atril",
    "version": "< 1.26.3",
    "vendor": "mate-desktop",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}