Common Weakness Enumeration
CWE-59
AllowedImproper Link Resolution Before File Access ('Link Following')
Abstraction: Base · Status: Draft
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
2426 vulnerabilities reference this CWE, most recent first.
CVE-2026-103263 (GCVE-0-2026-103263)
Vulnerability from cvelistv5 – Published: 2026-10-01 10:42 – Updated: 2026-10-01 19:29
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink
Summary
Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 19:29 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/437a… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
Unaffected: 6.5.9 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-09-14 00:00
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CVE-2026-102242 (GCVE-0-2026-102242)
Vulnerability from cvelistv5 – Published: 2026-09-29 17:47 – Updated: 2026-09-29 18:35
VLAI
EPSS
VEX
Title
Path Traversal via Symlink Following in allowedLocalRoots in MCP Toolbox for Databases
Summary
Improper link resolution (CWE-59 / CWE-22) in the allowedLocalRoots path validation in Google MCP Toolbox for Databases versions 1.2.0 through 1.9.0 allows a remote authenticated attacker with tool execution permissions to bypass directory boundary restrictions via symbolic links. Because path validation checks directories lexically without resolving symbolic links first, an attacker can access or overwrite arbitrary local files located outside the permitted root directories.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:35 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases |
Affected:
1.2.0 , ≤ 1.9.0
(semver)
|
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CVE-2026-102204 (GCVE-0-2026-102204)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-19 23:52
VLAI
EPSS
VEX
Title
Microsoft Microsoft Defender for Endpoint Elevation of Privilege Vulnerability
Summary
Improper link resolution before file access ('link following') in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 21:58 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Defender for Endpoint for Linux |
Affected:
-
cpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:*:*:* |
Date Public
2026-10-13 14:00
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CVE-2026-102202 (GCVE-0-2026-102202)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-19 23:52
VLAI
EPSS
VEX
Title
Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability
Summary
Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 21:16 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 11 version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7652
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7652
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.9711
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.9711
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.3231
(custom)
|
|
| Microsoft | Windows 11 Version 26H2 |
Affected:
10.0.26300.0 , < 10.0.26300.9711
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5761
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33650
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33650
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-102118 (GCVE-0-2026-102118)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:18 – Updated: 2026-10-01 13:37
VLAI
EPSS
VEX
Title
Kiteworks Core before version 9.5.0 is vulnerable to Local Privilege Escalation
Summary
A local privilege escalation vulnerability in Kiteworks could have allowed an attacker with an existing shell under a low-privileged service account to escalate to root privileges on the appliance.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:28 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/kiteworks/security-advisories/… | vendor-advisory |
| https://raw.githubusercontent.com/cisagov/CSAF/de… | third-party-advisory |
Impacted products
Date Public
2026-09-30 00:00
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CVE-2026-102113 (GCVE-0-2026-102113)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:20 – Updated: 2026-10-01 13:37
VLAI
EPSS
VEX
Title
Kiteworks Core Local Privilege Escalation
Summary
A privilege escalation vulnerability in Kiteworks could allow an attacker who has already obtained code execution as an unprivileged backend service account on the appliance to escalate to root. A privileged routine did not safely handle a filesystem path that the lower-privileged account could influence, allowing the attacker to cause a root-owned operation to run arbitrary commands with the highest privileges. Exploitation requires existing local access to that service account.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:21 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/kiteworks/security-advisories/… | vendor-advisory |
| https://raw.githubusercontent.com/cisagov/CSAF/de… | third-party-advisory |
Impacted products
Date Public
2026-09-30 00:00
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CVE-2026-101894 (GCVE-0-2026-101894)
Vulnerability from cvelistv5 – Published: 2026-09-28 16:57 – Updated: 2026-09-28 17:39
VLAI
EPSS
VEX
Title
@xhmikosr/decompress: Path traversal via symlink chain
Summary
The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 17:38 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/XhmikosR/decompress/security/a… | x_refsource_CONFIRM |
| https://github.com/XhmikosR/decompress/commit/5f4… | x_refsource_MISC |
| https://github.com/XhmikosR/decompress/commit/f6c… | x_refsource_MISC |
| https://github.com/XhmikosR/decompress/releases/t… | x_refsource_MISC |
| https://github.com/XhmikosR/decompress/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| XhmikosR | decompress |
Affected:
< 10.2.2
Affected: >= 11.0.0, < 11.1.4 |
|
| kevva | decompress |
Affected:
<= 4.2.1
|
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CVE-2026-100838 (GCVE-0-2026-100838)
Vulnerability from cvelistv5 – Published: 2026-09-27 01:28 – Updated: 2026-10-08 15:22
VLAI
EPSS
VEX
Title
Contrast before 1.19.1 CopyFile Policy Symlink Subversion
Summary
Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to connect to the Kata agent VSOCK could issue a series of CopyFile requests to overwrite security-critical files in the guest or trick the workload into disclosing sensitive data, effectively amounting to a full guest takeover. Users unable to upgrade can apply an equivalent rego policy fix passed to 'contrast generate --policy'.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 16:55 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/edgelesssys/contrast/security/… | vendor-advisory |
| https://www.vulncheck.com/advisories/contrast-bef… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| edgelesssys | contrast |
Affected:
0 , < 1.19.1
(semver)
Unaffected: 1.19.1 (semver) |
Date Public
2026-04-23 00:00
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CVE-2026-100716 (GCVE-0-2026-100716)
Vulnerability from cvelistv5 – Published: 2026-09-26 13:24 – Updated: 2026-09-28 14:41
VLAI
EPSS
VEX
Title
Froxlor before 2.3.12 Privilege Escalation via Symlink
Summary
Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 2.3.12.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 14:40 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/froxlor/froxlor/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/froxlor-befo… | third-party-advisory |
Impacted products
Date Public
2026-09-06 00:00
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CVE-2026-100715 (GCVE-0-2026-100715)
Vulnerability from cvelistv5 – Published: 2026-09-26 13:24 – Updated: 2026-09-28 16:59
VLAI
EPSS
VEX
Title
Froxlor before 2.3.12 Arbitrary File Deletion via Symlink
Summary
Froxlor through 2.3.10 is vulnerable to arbitrary file deletion via symlink following in the FTP data deletion cron task. Cron task 8 (deleteFtpData), queued when an FTP account is deleted, calls FileDir::makeCorrectDir() without the $fixed_homedir argument, so the symlink component walk is skipped, and then executes 'rm -rf' as root on the resulting path with string-level guards only. Because makeCorrectDir() appends a trailing slash, GNU rm dereferences a symlink used either as an intermediate path component or as the final component. An authenticated customer who can write to the FTP home directory can plant a symlink between task insertion and cron execution, causing the root cron job to recursively delete arbitrary directory trees, resulting in cross-tenant data destruction and host denial of service. This issue is fixed in Froxlor 2.3.12.
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 16:56 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/froxlor/froxlor/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/froxlor-befo… | third-party-advisory |
Impacted products
Date Public
2026-09-06 00:00
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Mitigation MIT-48.1
Architecture and Design
Strategy: Separation of Privilege
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack
An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.
CAPEC-17: Using Malicious Files
An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
CAPEC-35: Leverage Executable Code in Non-Executable Files
An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
CAPEC-76: Manipulating Web Input to File System Calls
An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.