Common Weakness Enumeration
CWE-59
Weakness AllowedImproper Link Resolution Before File Access
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.
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Modes of introduction
Implementation
REALIZATION: This weakness is caused during implementation of an architectural security tactic.
Detection methods
Automated Static Analysis - Binary or Bytecode
According to SOAR [REF-1479], the following detection techniques may be useful:
Cost effective for partial coverage:
Bytecode Weakness Analysis - including disassembler + source code weakness analysis
Effectiveness: SOAR Partial
Manual Static Analysis - Binary or Bytecode
According to SOAR [REF-1479], the following detection techniques may be useful:
Cost effective for partial coverage:
Binary / Bytecode disassembler - then use manual analysis for vulnerabilities & anomalies
Effectiveness: SOAR Partial
Dynamic Analysis with Automated Results Interpretation
According to SOAR [REF-1479], the following detection techniques may be useful:
Cost effective for partial coverage:
Web Application Scanner
Web Services Scanner
Database Scanners
Effectiveness: SOAR Partial
Dynamic Analysis with Manual Results Interpretation
According to SOAR [REF-1479], the following detection techniques may be useful:
Cost effective for partial coverage:
Fuzz Tester
Framework-based Fuzzer
Effectiveness: SOAR Partial
Manual Static Analysis - Source Code
According to SOAR [REF-1479], the following detection techniques may be useful:
Highly cost effective:
Focused Manual Spotcheck - Focused manual analysis of source
Manual Source Code Review (not inspections)
Effectiveness: High
Automated Static Analysis - Source Code
According to SOAR [REF-1479], the following detection techniques may be useful:
Cost effective for partial coverage:
Source code Weakness Analyzer
Context-configured Source Code Weakness Analyzer
Effectiveness: SOAR Partial
Architecture or Design Review
According to SOAR [REF-1479], the following detection techniques may be useful:
Highly cost effective:
Formal Methods / Correct-By-Construction
Cost effective for partial coverage:
Inspection (IEEE 1028 standard) (can apply to requirements, design, source code, etc.)
Effectiveness: High
Notes
Theoretical
Link following vulnerabilities are Multi-factor Vulnerabilities (MFV). They are the combination of multiple elements: file or directory permissions, filename predictability, race conditions, and in some cases, a design limitation in which there is no mechanism for performing atomic file creation operations.
Some potential factors are race conditions, permissions, and predictability.
Content history
Submission: PLOVER
· 2006-07-19
· CWE Draft 3
Modification: Eric Dalci
· Cigital
· 2008-07-01
· CWE 1.0
updated Time_of_Introduction
Modification: CWE Content Team
· MITRE
· 2008-09-08
· CWE 1.0
updated Alternate_Terms, Applicable_Platforms, Relationships, Other_Notes, Relationship_Notes, Taxonomy_Mappings, Weakness_Ordinalities
Modification: CWE Content Team
· MITRE
· 2008-11-24
· CWE 1.1
updated Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2009-01-12
· CWE 1.2
updated Relationships
Modification: CWE Content Team
· MITRE
· 2009-05-27
· CWE 1.4
updated Description, Name
Modification: CWE Content Team
· MITRE
· 2009-10-29
· CWE 1.6
updated Background_Details, Other_Notes
Modification: CWE Content Team
· MITRE
· 2010-02-16
· CWE 1.8
updated Potential_Mitigations, Relationships
Modification: CWE Content Team
· MITRE
· 2010-04-05
· CWE 1.8.1
updated Related_Attack_Patterns
Modification: CWE Content Team
· MITRE
· 2011-06-01
· CWE 1.13
updated Common_Consequences
Modification: CWE Content Team
· MITRE
· 2011-09-13
· CWE 2.1
updated Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2012-05-11
· CWE 2.2
updated Common_Consequences, Observed_Examples, References, Relationships
Modification: CWE Content Team
· MITRE
· 2012-10-30
· CWE 2.3
updated Potential_Mitigations
Modification: CWE Content Team
· MITRE
· 2014-06-23
· CWE 2.7
updated Common_Consequences, Other_Notes
Modification: CWE Content Team
· MITRE
· 2014-07-30
· CWE 2.8
updated Detection_Factors, Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2015-12-07
· CWE 2.9
updated Relationships
Modification: CWE Content Team
· MITRE
· 2017-11-08
· CWE 3.0
updated Affected_Resources, Applicable_Platforms, Causal_Nature, Common_Consequences, Functional_Areas, Likelihood_of_Exploit, Modes_of_Introduction, Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2019-01-03
· CWE 3.2
updated Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2019-06-20
· CWE 3.3
updated Relationships
Modification: CWE Content Team
· MITRE
· 2020-02-24
· CWE 4.0
updated Relationships
Modification: CWE Content Team
· MITRE
· 2021-03-15
· CWE 4.4
updated Relationships
Modification: CWE Content Team
· MITRE
· 2021-10-28
· CWE 4.6
updated Relationships
Modification: CWE Content Team
· MITRE
· 2022-04-28
· CWE 4.7
updated Research_Gaps
Modification: CWE Content Team
· MITRE
· 2022-06-28
· CWE 4.8
updated Relationships
Modification: CWE Content Team
· MITRE
· 2022-10-13
· CWE 4.9
updated Alternate_Terms, Background_Details, Observed_Examples, References, Relationship_Notes, Theoretical_Notes
Modification: CWE Content Team
· MITRE
· 2023-01-31
· CWE 4.10
updated Description
Modification: CWE Content Team
· MITRE
· 2023-04-27
· CWE 4.11
updated Relationships
Modification: CWE Content Team
· MITRE
· 2023-06-29
· CWE 4.12
updated Mapping_Notes
Modification: CWE Content Team
· MITRE
· 2025-09-09
· CWE 4.18
updated Detection_Factors, References
Modification: CWE Content Team
· MITRE
· 2025-12-11
· CWE 4.19
updated Applicable_Platforms, Relationships
Modification: CWE Content Team
· MITRE
· 2026-10-28
· CWE 5.0
updated Alternate_Terms, Name, Observed_Examples
2559 vulnerabilities reference this CWE, most recent first.
CVE-2026-123532 (GCVE-0-2026-123532)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-08 01:37
VLAI
EPSS
VEX
Title
gix-fs before 0.24.1 NTLM Credential Disclosure via Windows Symlink UNC Probe
Summary
gix-fs in gitoxide before 0.24.1 contains a credential disclosure vulnerability that allows remote attackers to capture NTLM credentials by supplying UNC symlink targets in a crafted repository. When a victim checks out the repository on Windows with symlinks enabled, gix_fs::symlink::create calls is_dir() on the UNC target, triggering SMB authentication that leaks the username, domain, and NTLMv2 hash.
Severity
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/GitoxideLabs/gitoxide/security… | vendor-advisory |
| https://www.vulncheck.com/advisories/gix-fs-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitoxideLabs | gitoxide |
Affected:
0 , < 0.24.1
(semver)
Unaffected: 0.24.1 (semver) cpe:2.3:a:gitoxidelabs:gitoxide:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-123496 (GCVE-0-2026-123496)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-08 01:37
VLAI
EPSS
VEX
Title
Vikunja veans before 2.7.1 Symlink Following in veans init
Summary
Vikunja veans before 2.7.1 contains a symlink following vulnerability that allows attackers to make veans init write files outside the repository via crafted repo symlinks. Attackers can ship symlinked .veans.yml, .claude, or .opencode entries to overwrite user files like ~/.bashrc or install veans hooks and plugins globally.
Severity
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/vikunja-vean… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
0 , < 2.7.1
(semver)
Unaffected: 2.7.1 (semver) cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-123037 (GCVE-0-2026-123037)
Vulnerability from cvelistv5 – Published: 2026-11-06 05:38 – Updated: 2026-11-06 18:36
VLAI
EPSS
VEX
Title
Ansible-core: user module generate_ssh_key follows a symlinked ~/.ssh enabling local privilege escalation (incomplete fix of cve-2024-9902)
Summary
A flaw was found in the ansible-core user module. When generate_ssh_key is enabled, User.ssh_key_gen() guards the key files against symlinks but checks the ~/.ssh directory only with os.path.exists(). An unprivileged user on a managed node who replaces their ~/.ssh with a symlink to an existing root-writable directory causes the privileged module to write the generated key pair through the symlink and then chown both files to that user. Because such files can be dropped into directories processed by schedulers (e.g. /etc/cron.daily) or dynamic MOTD (/etc/update-motd.d), the user can escalate to root on the managed node. This is an incomplete fix of CVE-2024-9902.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:36 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-123037 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2567189 | issue-trackingx_refsource_REDHAT |
Impacted products
15 products
Date Public
2026-11-05 09:30
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CVE-2026-122235 (GCVE-0-2026-122235)
Vulnerability from cvelistv5 – Published: 2026-11-04 21:06 – Updated: 2026-11-04 21:06
VLAI
EPSS
VEX
Title
Jan 0.8.5 before 0.8.8 Workspace Guard Bypass via Dangling Symlink
Summary
Jan from 0.8.5 before 0.8.8 contains a workspace guard bypass vulnerability in the agent-tools gate.rs that allows attackers to write files outside the workspace via dangling symlinks. Attackers supplying a malicious repository can use prompt injection to make the write or edit tools follow symlinks, creating files like ~/.ssh/authorized_keys on the host.
Severity
4.7 (Medium)
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/janhq/jan/security/advisories/… | vendor-advisory |
| https://github.com/janhq/jan/pull/9424 | patchissue-tracking |
| https://github.com/janhq/jan/commit/840c33e65182b… | patch |
| https://github.com/janhq/jan/releases/tag/v0.8.8 | release-notes |
| https://www.vulncheck.com/advisories/jan-0.8.5-be… | third-party-advisory |
Date Public
2026-10-29 10:44
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CVE-2026-122136 (GCVE-0-2026-122136)
Vulnerability from cvelistv5 – Published: 2026-11-04 20:36 – Updated: 2026-11-04 20:36
VLAI
EPSS
VEX
Title
Powerlevel10k before 1.20.19 Symlink Following via Instant Prompt Temporary File
Summary
Powerlevel10k before 1.20.19 contains a symlink following vulnerability in _p9k_dump_instant_prompt that allows local attackers to overwrite victim-writable files via a predictable temporary path. Attackers can pre-plant symlinks at p10k-instant-prompt-output-<user>-<pid> in TMPDIR, guessing the victim's shell PID, so shell startup truncates and overwrites targeted files.
Severity
4.4 (Medium)
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/romkatv/powerlevel10k/issues/2972 | issue-tracking |
| https://github.com/romkatv/powerlevel10k | product |
| https://github.com/romkatv/powerlevel10k/commit/7… | patch |
| https://github.com/romkatv/powerlevel10k/blob/v1.… | technical-description |
| https://www.vulncheck.com/advisories/powerlevel10… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| romkatv | powerlevel10k |
Affected:
0 , < 1.20.19
(custom)
|
Date Public
2026-10-31 00:00
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CVE-2026-121747 (GCVE-0-2026-121747)
Vulnerability from cvelistv5 – Published: 2026-11-04 21:30 – Updated: 2026-11-04 21:30
VLAI
EPSS
VEX
Title
nvm prints the contents of any readable file through a symlinked .nvmrc
Summary
Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version <...>` message; with the README's zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim's output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README's bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it.
Severity
5.5 (Medium)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nvm-sh/nvm/security/advisories… | vendor-advisory |
| https://github.com/nvm-sh/nvm/commit/67268ebcb6e1… | patch |
| https://github.com/nvm-sh/nvm/commit/c314f1cbb3c3… | patch |
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CVE-2026-121746 (GCVE-0-2026-121746)
Vulnerability from cvelistv5 – Published: 2026-11-04 21:31 – Updated: 2026-11-04 21:31
VLAI
EPSS
VEX
Title
nvm use --save and nvm install --save write through a symlinked .nvmrc, overwriting any file the user can write
Summary
Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, `nvm use --save` and `nvm install --save` (or `-w`) write the resolved version to `$PWD/.nvmrc` with `tee`, which follows a symbolic link. A repository that commits `.nvmrc` as a symlink to a path outside itself (git recreates the link on clone) therefore makes `--save` truncate any file the user can write, such as a shell startup file or `~/.ssh/authorized_keys`, and replace its contents with the version string, or create the target of a dangling link; the link itself is left unchanged, so `git status` stays clean. The attacker does not control the content written, so this is data loss, not code execution. Version 0.41.0 refuses, with a warning, to write when `.nvmrc` in the current directory is a symlink, dangling or not, rather than writing through it or replacing it.
Severity
5.5 (Medium)
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nvm-sh/nvm/security/advisories… | vendor-advisory |
| https://github.com/nvm-sh/nvm/commit/3f8411e58d40… | patch |
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CVE-2026-121550 (GCVE-0-2026-121550)
Vulnerability from cvelistv5 – Published: 2026-11-03 15:17 – Updated: 2026-11-03 15:17
VLAI
EPSS
VEX
Title
nnn through 5.3 Symlink-Following Write via NNN_FIFO Handling
Summary
nnn through 5.3 contains an insecure file handling vulnerability that allows local attackers to redirect writes because main() accepts an existing NNN_FIFO path without verifying it is a FIFO. Attackers can pre-create the documented predictable /tmp/nnn.fifo path as a symlink or readable regular file, causing victim-writable files to be overwritten or leaking the victim's browsed paths.
Severity
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/jarun/nnn/issues/2188 | issue-tracking |
| https://github.com/jarun/nnn | product |
| https://github.com/jarun/nnn/commit/04715921aece0… | patch |
| https://github.com/jarun/nnn/blob/v5.3/src/nnn.c#L10635 | technical-description |
| https://github.com/jarun/nnn/blob/v5.3/src/nnn.c#L7433 | technical-description |
| https://www.vulncheck.com/advisories/nnn-through-… | third-party-advisory |
Date Public
2026-10-31 00:00
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CVE-2026-121546 (GCVE-0-2026-121546)
Vulnerability from cvelistv5 – Published: 2026-11-03 15:17 – Updated: 2026-11-03 15:17
VLAI
EPSS
VEX
Title
ruTorrent before 5.3.20 Path Traversal via datadir Plugin Symlink Following
Summary
ruTorrent before 5.3.20 contains a path traversal vulnerability in the datadir plugin that allows authenticated users to escape the topDirectory jail because correctDirectory() does not resolve symbolic links. Attackers can submit a datadir path through a symlink under their top directory to create directories and move torrent data to locations writable by the web server or rtorrent.
Severity
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/Novik/ruTorrent/issues/3474 | issue-tracking |
| https://github.com/Novik/ruTorrent | product |
| https://github.com/Novik/ruTorrent/commit/2059ff1… | patch |
| https://github.com/Novik/ruTorrent/blob/v5.3.19/p… | technical-description |
| https://github.com/Novik/ruTorrent/blob/v5.3.19/p… | technical-description |
| https://www.vulncheck.com/advisories/rutorrent-be… | third-party-advisory |
Date Public
2026-10-28 00:00
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CVE-2026-120307 (GCVE-0-2026-120307)
Vulnerability from cvelistv5 – Published: 2026-11-01 12:49 – Updated: 2026-11-02 19:46
VLAI
EPSS
VEX
Title
Beta9 container escape via unvalidated sandbox file paths
Summary
The Beta9 worker serves the sandbox file API from outside the container. getHostPathFromContainerPath turns the tenant's container path into a worker path. If the unresolved path starts with a mount destination, including the default upload mount at /tmp/.beta9, the remainder is joined onto that mount's source with filepath.Join, which cleans parent-directory segments after the prefix check. A long enough run of those segments names any absolute path on the worker. A path that matches no mount is joined onto the container root and opened in the worker's own filesystem, so an absolute symbolic link such as /var/run pointing at /run is followed against the worker root. Upload, download, stat, list, find-in-files, replace-in-files, and delete-file all call this helper. A tenant with a workspace token and one running sandbox can read, write, list, and delete files on the hosting worker as root, including files of other tenants on that machine. A read-only proof downloaded the worker pod's Kubernetes service account token through the file API for a path that did not exist inside the sandbox. In the shipped remote-node manifests that service account is bound to cluster-admin. Fixed in worker 0.1.756: sandbox file operations and workspace sync open paths with os.OpenRoot, so parent-directory and symlink lookups stay inside the container root or the mount source.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 19:46 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/beam-cloud/beta9 | product |
| https://github.com/beam-cloud/beta9/pull/1897 | patch |
| https://github.com/beam-cloud/beta9/commit/a28bf1… | patch |
| https://github.com/beam-cloud/beta9/releases/tag/… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| beam-cloud | Beta9 worker |
Affected:
0 , < 0.1.756
(semver)
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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.