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.
860 vulnerabilities reference this CWE, most recent first.
CVE-2026-107810 (GCVE-0-2026-107810)
Vulnerability from cvelistv5 – Published: 2026-10-09 15:25 – Updated: 2026-10-13 16:56
VLAI
EPSS
VEX
Title
Nginx UI: Backup restore follows crafted symlinks into the live Nginx configuration path before restore flags are applied
Summary
Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, internal/backup/restore.go extracts inner archives before applying the restore_nginx and restore_nginx_ui flags and permits symlinks targeting the live Nginx configuration path. An authenticated user who can create and restore backups can craft a valid backup that places a symlink in the staging tree and then writes a regular file through that link, even when both restore flags are false. This can persistently inject configuration or cause denial of service when the modified files are later consumed. This issue is fixed in version 2.5.0.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 16:56 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/0xJacky/nginx-ui/security/advi… | x_refsource_CONFIRM |
| https://github.com/0xJacky/nginx-ui/commit/a467ed… | x_refsource_MISC |
| https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0 | x_refsource_MISC |
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CVE-2026-107716 (GCVE-0-2026-107716)
Vulnerability from cvelistv5 – Published: 2026-10-08 21:33 – Updated: 2026-10-09 15:13
VLAI
EPSS
VEX
Title
Banks: Symlink traversal and arbitrary file disclosure/overwrite in DirectoryPromptRegistry
Summary
Banks generates meaningful LLM prompts using a simple template language. Prior to 2.5.1, Banks DirectoryPromptRegistry does not reject symbolic links for index.json or discovered and existing .jinja prompt files. In an application where untrusted users can influence a prompt directory, DirectoryPromptRegistry._scan() and DirectoryPromptRegistry.get() can follow a link outside the registry root and disclose a file, while DirectoryPromptRegistry.set(), DirectoryPromptRegistry._save(), and DirectoryPromptRegistry._load() can read or overwrite an external link target. The issue requires attacker influence over the registry directory or its extracted contents. This issue is fixed in version 2.5.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 14:54 UTC
CWE
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/masci/banks/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/masci/banks/pull/79 | x_refsource_MISC |
| https://github.com/masci/banks/commit/23ed13e50b4… | x_refsource_MISC |
| https://github.com/masci/banks/releases/tag/v2.5.1 | x_refsource_MISC |
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CVE-2026-107707 (GCVE-0-2026-107707)
Vulnerability from cvelistv5 – Published: 2026-10-08 19:51 – Updated: 2026-10-09 14:40
VLAI
EPSS
VEX
Title
Intego Antivirus through 3.0.0.1 Local Privilege Escalation via Optimization Module Junction
Summary
Intego Antivirus for Windows through 3.0.0.1 contains a link following vulnerability in its optimization module that allows local unprivileged users to delete arbitrary folders as SYSTEM. Attackers can replace a scanned duplicate file's directory with a junction to C:\Config.msi and abuse Windows Installer rollback to execute code as SYSTEM.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 14:40 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://blog.quarkslab.com/milking-the-last-drop-… | technical-descriptionexploit |
| https://www.intego.com/ | product |
| https://www.vulncheck.com/advisories/intego-antiv… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Intego | Intego Antivirus |
Affected:
0 , ≤ 3.0.0.1
(custom)
|
Date Public
2026-04-07 00:00
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CVE-2026-107608 (GCVE-0-2026-107608)
Vulnerability from cvelistv5 – Published: 2026-10-08 19:36 – Updated: 2026-10-08 19:53
VLAI
EPSS
VEX
Title
Improper link resolution in asset bundling output handling in aws-cdk-lib
Summary
Improper link resolution before file access in the asset bundling output handling in AWS aws-cdk-lib before 2.267.0 might allow a context-dependent actor to cause files from the build host to be published as the deployed asset.
To remediate this issue, users should upgrade to version 2.267.0 or later.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 19:53 UTC
CWE
- CWE-59 - Improper link resolution before file access ('link following')
Assigner
AMZN
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/aws/aws-cdk/releases/tag/v2.267.0 | patchrelease-notes |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | aws-cdk-lib |
Affected:
0 , < 2.267.0
(custom)
cpe:2.3:a:aws:aws-cdk-lib:*:*:*:*:*:*:*:* |
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CVE-2026-107578 (GCVE-0-2026-107578)
Vulnerability from cvelistv5 – Published: 2026-10-08 11:47 – Updated: 2026-10-08 14:17
VLAI
EPSS
VEX
Title
Improper Link Resolution Before File Access ('Link Following') in hMailServer
Summary
Improper link resolution and external control of file paths in the administrative command-line operations of hMailServer.exe in Progressive Robot hMailServer 6.3.4 and 6.3.5 allow a local attacker who already runs code as the low-privilege service account to escalate privilege. On Windows, operations run with administrator rights by the installer, DBSetup, the Control Panel or an administrator wrote log entries and crash records into the log folder, created, deleted and changed the permissions of the self-signed certificate and private key in the data folder, and rewrote message files in the data folder, all by path in folders the service account (NT SERVICE\hMailServer, the default for new installations since 6.3.4) can modify, following junctions and mount points; and the store-maintenance operations reached files by names taken from the database, which the service account can write, including names outside the data folder. On Linux, the store-maintenance and object-storage operations run as root followed symbolic links the service account (the packaged hmailserver user, which owns the data folder) planted in it, so a root-run operation read, wrote or removed the link's target as root. A local attacker controlling the service account can thereby gain the administrator's (Windows) or root's (Linux) privileges when such an operation is run.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 14:17 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
GitLab
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Progressive Robot Ltd | hMailServer |
Affected:
6.3.4 , < 6.3.6
(semver)
|
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CVE-2026-107347 (GCVE-0-2026-107347)
Vulnerability from cvelistv5 – Published: 2026-10-29 18:10 – Updated: 2026-10-30 17:19
VLAI
EPSS
VEX
Title
Nomad dispatch payload writes can escape the allocation directory through symlinks
Summary
HashiCorp Nomad and Nomad Enterprise are vulnerable to symlink following during dispatch payload and executor log writes that may allow a malicious workload to modify files outside its allocation directory. When the client agent runs as root, this could lead to code execution as root on the client host. This vulnerability (CVE-2026-107347) is fixed in Nomad 2.1.1 and Nomad Enterprise 2.1.0, 1.11.12, and 1.10.18.
Severity
8.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 17:19 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access (Link Following)
Assigner
HashiCorp
CNA
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| HashiCorp | Nomad |
Affected:
0.3.0 , < 2.1.1
(semver)
|
|
| HashiCorp | Nomad Enterprise |
Affected:
0.3.0 , < 2.1.0
(semver)
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CVE-2026-106508 (GCVE-0-2026-106508)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:47 – Updated: 2026-10-09 01:56
VLAI
EPSS
VEX
Title
Backstage: Potential file exposure through local TechDocs publisher
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users. This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 01:56 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/6ae… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106507 (GCVE-0-2026-106507)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:46 – Updated: 2026-10-07 15:03
VLAI
EPSS
VEX
Title
Backstage: TechDocs arbitrary file read via mkdocs snippets
Summary
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:03 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/911… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage/plugin-techdocs-node | plugin-techdocs-node |
Affected:
< 1.15.4
|
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CVE-2026-106500 (GCVE-0-2026-106500)
Vulnerability from cvelistv5 – Published: 2026-10-06 21:29 – Updated: 2026-10-07 15:48
VLAI
EPSS
VEX
Title
Backstage: Improper task state validation in Scaffolder backend
Summary
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:47 UTC
CWE
Assigner
GitHub_M
CNA
References
7 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/0d2… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/56b… | x_refsource_MISC |
| https://github.com/backstage/backstage/commit/9e8… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.49.6
Affected: >= 1.50.0-next.0, < 1.50.5 Affected: >= 1.51.0-next.0, < 1.54.6 |
|
| @backstage | plugin-scaffolder-backend |
Affected:
< 3.3.1
Affected: >= 3.4.0, < 3.4.1 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.0.4, < 4.1.0 |
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CVE-2026-106486 (GCVE-0-2026-106486)
Vulnerability from cvelistv5 – Published: 2026-10-06 20:35 – Updated: 2026-10-07 16:22
VLAI
EPSS
VEX
Title
Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions
Summary
Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 16:21 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/818… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | plugin-scaffolder-backend-module-bitbucket-cloud |
Affected:
< 0.3.10
|
|
| @backstage | plugin-scaffolder-backend-module-bitbucket-server |
Affected:
< 0.2.25
|
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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.