ubuntu-cve-2026-46529
Vulnerability from osv_ubuntu
Published
2026-05-20 00:00
Modified
2026-06-30 16:22
Summary
Details
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
7.8 (High)
N/A (UNKNOWN)
References
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{
"binary_name": "libppsdocument-4.0-6",
"binary_version": "50.1-0ubuntu1.1"
},
{
"binary_name": "libppsview-4.0-5",
"binary_version": "50.1-0ubuntu1.1"
},
{
"binary_name": "papers",
"binary_version": "50.1-0ubuntu1.1"
},
{
"binary_name": "papers-common",
"binary_version": "50.1-0ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "papers",
"purl": "pkg:deb/ubuntu/papers@50.1-0ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "50.1-0ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"48.0-1ubuntu1",
"49.1-1ubuntu1",
"49.2-1ubuntu1",
"49.2-3ubuntu1",
"50~beta-0ubuntu2",
"50.0-0ubuntu1",
"50.0-0ubuntu2",
"50.1-0ubuntu1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-46529",
"modified": "2026-06-30T16:22:50Z",
"published": "2026-05-20T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-46529"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46529"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2026/05/19/34"
},
{
"type": "REPORT",
"url": "https://medeiros.zip/posts/CVE-2026-46529-evince"
},
{
"type": "REPORT",
"url": "https://blogs.gnome.org/mcatanzaro/2026/05/21/single-click-code-execution-exploit-for-evince-atril-and-xreader/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8295-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8321-1"
}
],
"related": [
"USN-8295-1",
"USN-8321-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-46529"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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