CVE-2026-96807
📛 CVE Title
CVE-2026-96807
Description
In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- MEDIUM
- CVSS score
- 4.0 / 10
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L- Effective score
- 4.0 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-61 - Reserved
- 2026-09-23
- Published
- 2026-09-23 16:54 UTC
- Last updated
- 2026-09-23 16:54 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/96xxx/CVE-2026-96807.json
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-23 17:17:25 UTC
- NVD last modified
- 2026-09-23 17:17:25 UTC
- NVD CVSS v3.1
- 4.0 / 10 MEDIUM source: cve@mitre.org
- NVD CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L- Exploitability subscore
- 1.4 / 10
- Impact subscore
- 2.5 / 10
NVD / KEV / EPSS data refreshed 2026-09-24 04:21 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-85423 - Assigner
- mitre
- Published
- Sep 23, 2026, 4:54:16 PM
- Updated
- Sep 23, 2026, 4:54:16 PM
- EUVD base score (CVSS 3.1)
-
4.0 / 10
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L - EUVD-reported EPSS
- 0.0000
- Vendors
- flatpak
- Products
-
flatpak (0 <1.18.1)
ENISA description: In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Flatpak | Flatpak |
0 (affected)
|
Linux |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
Remediations (10)
-
web:access.redhat.com
A deferred status means that a fix for an affected product version is not guaranteed due to higher-priority development work. Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options: Apply a mitigation (if one exists).
2026-09-24 11:41 UTC -
web:app.opencve.io
Impact In versions of Flatpak prior to 1.18.1 a malicious sandboxed application can replace the user‑specific ld.so file with a symlink. During regenerate_ld_cache this symlink causes the cache regeneration process to write a file to an attacker‑controlled location inside the user's home directory, leading to arbitrary file overwrite. While the attacker cannot control the name or ...
2026-09-24 11:41 UTC -
web:security-tracker.debian.org
Vulnerable and fixed packages The table below lists information on source packages.
2026-09-24 11:41 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-09-24 11:41 UTC -
web:support.microsoft.com
Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...
2026-09-24 11:41 UTC -
web:support.microsoft.com
This Hotpatch update for Windows 11, version 25H2 and 24H2 (KB5079420), improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of ...
2026-09-24 11:41 UTC -
web:support.servicenow.com
ServiceNow has addressed a critical remote code execution vulnerability that was identified in the ServiceNow AI platform. This vulnerability, tracked as CVE - 2026 -6875, could enable an unauthenticated
2026-09-24 11:41 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-09-24 11:41 UTC -
web:www.malwarebytes.com
Attackers are abusing a critical Ghost Content Management System (CMS) vulnerability to hijack more than 700 legitimate websites and inject a fake Cloudflare verification step that tricks visitors into running a Windows command that installs malware. These social engineering campaigns—where ...
2026-09-24 11:41 UTC -
web:www.tenable.com
Details Source: Mitre, NVD Published: 2026 -09-23 Updated: 2026 -09-23
2026-09-24 11:41 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-96807.json.
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"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Linux"
],
"product": "Flatpak",
"programFiles": [
"common/flatpak-run.c"
],
"programRoutines": [
{
"name": "regenerate_ld_cache"
}
],
"repo": "https://github.com/flatpak/flatpak",
"vendor": "Flatpak",
"versions": [
{
"lessThan": "1.18.1",
"status": "affected",
"version": "0",
"versionType": "semver"
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}
],
"metrics": [
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"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
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"references": [
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"url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-99wv-m8rp-g58x"
}
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"value": "<p>The issue has been fixed in version 1.18.1 by commits:</p>\n<ul>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/e13dfeda330625d2fecc3a54672dfd4dc9c83a5c\">e13dfed</a> \"common: Fix return value and typos in flatpak_switch_symlink_and_remove\"</li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/f6c8fb5fdb3737e2f45068afe12c4bf1d808fd55\">f6c8fb5</a> \"common: Use fd-based operations in flatpak_switch_symlink_and_remove\"</li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/76c9296b6780ca67f44cf67f0823f086d692a592\">76c9296</a> \"run: Harden regenerate_ld_cache against symlink attacks\"</li>\n</ul>\n<p>For LTS operating system distributions, backports of these changes are available in the <code>flatpak-1.16.x</code>\n branch. Please note that cherry-picked libglnx changes \"chase: Add \ninternal glnx_chaseat_full for a strategic callback\" and \"chase: Add \nglnx_chase_and_mkdirat\" are also required.</p>"
}
],
"value": "The issue has been fixed in version 1.18.1 by commits:\n\n\n\n * e13dfed https://github.com/flatpak/flatpak/commit/e13dfeda330625d2fecc3a54672dfd4dc9c83a5c \"common: Fix return value and typos in flatpak_switch_symlink_and_remove\"\n\n * f6c8fb5 https://github.com/flatpak/flatpak/commit/f6c8fb5fdb3737e2f45068afe12c4bf1d808fd55 \"common: Use fd-based operations in flatpak_switch_symlink_and_remove\"\n\n * 76c9296 https://github.com/flatpak/flatpak/commit/76c9296b6780ca67f44cf67f0823f086d692a592 \"run: Harden regenerate_ld_cache against symlink attacks\"\n\n\n\n\nFor LTS operating system distributions, backports of these changes are available in the flatpak-1.16.x\n branch. Please note that cherry-picked libglnx changes \"chase: Add \ninternal glnx_chaseat_full for a strategic callback\" and \"chase: Add \nglnx_chase_and_mkdirat\" are also required."
}
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"cveId": "CVE-2026-96807",
"datePublished": "2026-09-23T16:54:16.931Z",
"dateReserved": "2026-09-23T16:54:16.535Z",
"dateUpdated": "2026-09-23T16:54:16.931Z",
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