Common Weakness Enumeration

CWE-59

Allowed

Improper 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.

2335 vulnerabilities reference this CWE, most recent first.

GHSA-QJ96-83MW-F2RW

Vulnerability from github – Published: 2022-11-02 12:00 – Updated: 2022-11-02 19:00
VLAI
Details

This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Ventura 13. Processing a maliciously crafted DMG file may lead to arbitrary code execution with system privileges.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-32905"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-01T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Ventura 13. Processing a maliciously crafted DMG file may lead to arbitrary code execution with system privileges.",
  "id": "GHSA-qj96-83mw-f2rw",
  "modified": "2022-11-02T19:00:23Z",
  "published": "2022-11-02T12:00:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-32905"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT213488"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QJC9-F8HG-MV2P

Vulnerability from github – Published: 2025-12-02 21:31 – Updated: 2025-12-02 21:31
VLAI
Details

JumpCloud Remote Assist for Windows versions prior to 0.317.0 include an uninstaller that is invoked by the JumpCloud Windows Agent as NT AUTHORITY\SYSTEM during agent uninstall or update operations. The Remote Assist uninstaller performs privileged create, write, execute, and delete actions on predictable files inside a user-writable %TEMP% subdirectory without validating that the directory is trusted or resetting its ACLs when it already exists. A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. This issue is fixed in JumpCloud Remote Assist 0.317.0 and affects Windows systems where Remote Assist is installed and managed through the Agent lifecycle.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-34352"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-02T19:15:49Z",
    "severity": "HIGH"
  },
  "details": "JumpCloud Remote Assist for Windows versions prior to 0.317.0 include an uninstaller that is invoked by the JumpCloud Windows Agent as NT AUTHORITY\\SYSTEM during agent uninstall or update operations. The Remote Assist uninstaller performs privileged create, write, execute, and delete actions on predictable files inside a user-writable %TEMP% subdirectory without validating that the directory is trusted or resetting its ACLs when it already exists. A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. This issue is fixed in JumpCloud Remote Assist 0.317.0 and affects Windows systems where Remote Assist is installed and managed through the Agent lifecycle.",
  "id": "GHSA-qjc9-f8hg-mv2p",
  "modified": "2025-12-02T21:31:29Z",
  "published": "2025-12-02T21:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34352"
    },
    {
      "type": "WEB",
      "url": "https://jumpcloud.com/platform/remote-assistance"
    },
    {
      "type": "WEB",
      "url": "https://jumpcloud.com/support/list-of-jumpcloud-agent-release-notes"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/jumpcloud-remote-assist-arbitrary-file-write-delete-via-insecure-temp-directory"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-QJFR-H47V-47C8

Vulnerability from github – Published: 2026-09-08 18:32 – Updated: 2026-09-08 18:32
VLAI
Details

Improper link resolution before file access ('link following') in Windows Container Manager Service allows an authorized attacker to bypass a security feature locally.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-69771"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-08T18:19:48Z",
    "severity": "MODERATE"
  },
  "details": "Improper link resolution before file access (\u0027link following\u0027) in Windows Container Manager Service allows an authorized attacker to bypass a security feature locally.",
  "id": "GHSA-qjfr-h47v-47c8",
  "modified": "2026-09-08T18:32:58Z",
  "published": "2026-09-08T18:32:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69771"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69771"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QJQ3-WQJ5-G37Q

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-07-01 19:26
VLAI
Summary
Jenkins Pipeline: Groovy Libraries Plugin does not prohibit symbolic links in shared libraries
Details

Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries.

This allows attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.

Pipeline: Groovy Libraries Plugin 798.v5cc688825312 prohibits symbolic links in shared libraries.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.jenkins.plugins:pipeline-groovy-lib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "798.v5cc688825312"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48921"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-01T19:26:57Z",
    "nvd_published_at": "2026-05-27T15:16:31Z",
    "severity": "HIGH"
  },
  "details": "Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries.\n\nThis allows attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.\n\nPipeline: Groovy Libraries Plugin 798.v5cc688825312 prohibits symbolic links in shared libraries.",
  "id": "GHSA-qjq3-wqj5-g37q",
  "modified": "2026-07-01T19:26:57Z",
  "published": "2026-05-27T15:33:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48921"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jenkinsci/pipeline-groovy-lib-plugin"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3727"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Jenkins Pipeline: Groovy Libraries Plugin does not prohibit symbolic links in shared libraries"
}

GHSA-QJVR-7M59-JJ7M

Vulnerability from github – Published: 2022-05-02 00:05 – Updated: 2022-05-02 00:05
VLAI
Details

gather-messages.sh in Ampache 3.4.1 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/filelist temporary file.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2008-3929"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-09-04T18:41:00Z",
    "severity": "HIGH"
  },
  "details": "gather-messages.sh in Ampache 3.4.1 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/filelist temporary file.",
  "id": "GHSA-qjvr-7m59-jj7m",
  "modified": "2022-05-02T00:05:05Z",
  "published": "2022-05-02T00:05:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-3929"
    },
    {
      "type": "WEB",
      "url": "https://bugs.gentoo.org/show_bug.cgi?id=235770"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/44739"
    },
    {
      "type": "WEB",
      "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496369"
    },
    {
      "type": "WEB",
      "url": "http://dev.gentoo.org/~rbu/security/debiantemp/ampache"
    },
    {
      "type": "WEB",
      "url": "http://freshmeat.net/projects/ampache/releases/283935"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/31657"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/33316"
    },
    {
      "type": "WEB",
      "url": "http://security.gentoo.org/glsa/glsa-200812-22.xml"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2008/10/30/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/30875"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-QM4Q-4X5C-F7JF

Vulnerability from github – Published: 2026-09-15 21:33 – Updated: 2026-09-15 21:33
VLAI
Details

An insufficient check allowed for the overwrite of arbitrary files via a symlink.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-68491"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-15T21:16:42Z",
    "severity": "CRITICAL"
  },
  "details": "An insufficient check allowed for the overwrite of arbitrary files via a symlink.",
  "id": "GHSA-qm4q-4x5c-f7jf",
  "modified": "2026-09-15T21:33:04Z",
  "published": "2026-09-15T21:33:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68491"
    },
    {
      "type": "WEB",
      "url": "https://docs.solusvm.com/en/solusvm1/release-notes/mainline-branch/v1.30/#13015"
    },
    {
      "type": "WEB",
      "url": "https://docs.solusvm.com/en/solusvm1/release-notes/stable-branch/v1.30/#13015"
    },
    {
      "type": "WEB",
      "url": "https://support.solusvm.com/hc/en-us/articles/43503583489687-CVE-2026-68491-Vulnerability-in-SolusVM-1-allows-Guest-to-Host-privilege-escalation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-QM7H-F635-H2R6

Vulnerability from github – Published: 2026-07-15 18:31 – Updated: 2026-07-15 21:31
VLAI
Details

Microsoft AVML before 0.17.0 could follow a symlink when opening a destination output path on Unix, allowing truncation/overwrite of the symlink target. The destructive effect is performed at open-time via O_TRUNC, and can happen before full input validation completes (“truncation-before-validation”).

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-61371"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-15T16:16:50Z",
    "severity": "HIGH"
  },
  "details": "Microsoft AVML before 0.17.0 could follow a symlink when opening a destination output path on Unix, allowing truncation/overwrite of the symlink target. The destructive effect is performed at open-time via O_TRUNC, and can happen before full input validation completes (\u201ctruncation-before-validation\u201d).",
  "id": "GHSA-qm7h-f635-h2r6",
  "modified": "2026-07-15T21:31:21Z",
  "published": "2026-07-15T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61371"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/avml/pull/754"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/thesmartshadow/2d099071f847de8db3dc4bbaf4dfa6df"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/avml/releases/tag/v0.17.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QMGC-5H2G-MVRW

Vulnerability from github – Published: 2026-01-13 18:44 – Updated: 2026-01-13 18:44
VLAI
Summary
filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock
Details

Vulnerability Summary

Title: Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock

Affected Component: filelock package - SoftFileLock class File: src/filelock/_soft.py lines 17-27 CWE: CWE-362, CWE-367, CWE-59


Description

A TOCTOU race condition vulnerability exists in the SoftFileLock implementation of the filelock package. An attacker with local filesystem access and permission to create symlinks can exploit a race condition between the permission validation and file creation to cause lock operations to fail or behave unexpectedly.

The vulnerability occurs in the _acquire() method between raise_on_not_writable_file() (permission check) and os.open() (file creation). During this race window, an attacker can create a symlink at the lock file path, potentially causing the lock to operate on an unintended target file or leading to denial of service.

Attack Scenario

1. Lock attempts to acquire on /tmp/app.lock
2. Permission validation passes
3. [RACE WINDOW] - Attacker creates: ln -s /tmp/important.txt /tmp/app.lock
4. os.open() tries to create lock file
5. Lock operates on attacker-controlled target file or fails

Impact

What kind of vulnerability is it? Who is impacted?

This is a Time-of-Check-Time-of-Use (TOCTOU) race condition vulnerability affecting any application using SoftFileLock for inter-process synchronization.

Affected Users: - Applications using filelock.SoftFileLock directly - Applications using the fallback FileLock on systems without fcntl support (e.g., GraalPy)

Consequences: - Silent lock acquisition failure - applications may not detect that exclusive resource access is not guaranteed - Denial of Service - attacker can prevent lock file creation by maintaining symlink - Resource serialization failures - multiple processes may acquire "locks" simultaneously - Unintended file operations - lock could operate on attacker-controlled files

CVSS v4.0 Score: 5.6 (Medium) Vector: CVSS:4.0/AV:L/AT:L/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Attack Requirements: - Local filesystem access to the directory containing lock files - Permission to create symlinks (standard for regular unprivileged users on Unix/Linux) - Ability to time the symlink creation during the narrow race window


Patches

Has the problem been patched? What versions should users upgrade to?

Yes, the vulnerability has been patched by adding the O_NOFOLLOW flag to prevent symlink following during lock file creation.

Patched Version: Next release (commit: 255ed068bc85d1ef406e50a135e1459170dd1bf0)

Mitigation Details: - The O_NOFOLLOW flag is added conditionally and gracefully degrades on platforms without support - On platforms with O_NOFOLLOW support (most modern systems): symlink attacks are completely prevented - On platforms without O_NOFOLLOW (e.g., GraalPy): TOCTOU window remains but is documented

Users should: - Upgrade to the patched version when available - For critical deployments, consider using UnixFileLock or WindowsFileLock instead of the fallback SoftFileLock


Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

For users unable to update immediately:

  1. Avoid SoftFileLock in security-sensitive contexts - use UnixFileLock or WindowsFileLock when available (these were already patched for CVE-2025-68146)

  2. Restrict filesystem permissions - prevent untrusted users from creating symlinks in lock file directories: bash chmod 700 /path/to/lock/directory

  3. Use process isolation - isolate untrusted code from lock file paths to prevent symlink creation

  4. Monitor lock operations - implement application-level checks to verify lock acquisitions are successful before proceeding with critical operations


References

Are there any links users can visit to find out more?

  • Similar Vulnerability: CVE-2025-68146 (TOCTOU vulnerability in UnixFileLock/WindowsFileLock)
  • CWE-362 (Concurrent Execution using Shared Resource): https://cwe.mitre.org/data/definitions/362.html
  • CWE-367 (Time-of-check Time-of-use Race Condition): https://cwe.mitre.org/data/definitions/367.html
  • CWE-59 (Improper Link Resolution Before File Access): https://cwe.mitre.org/data/definitions/59.html
  • O_NOFOLLOW documentation: https://man7.org/linux/man-pages/man2/open.2.html
  • GitHub Repository: https://github.com/tox-dev/filelock

Reported by: George Tsigourakos (@tsigouris007)

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "filelock"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.20.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22701"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362",
      "CWE-367",
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-13T18:44:55Z",
    "nvd_published_at": "2026-01-10T06:15:52Z",
    "severity": "MODERATE"
  },
  "details": "## Vulnerability Summary\n\n**Title:** Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock\n\n**Affected Component:** `filelock` package - `SoftFileLock` class\n**File:** `src/filelock/_soft.py` lines 17-27\n**CWE:** CWE-362, CWE-367, CWE-59\n\n---\n\n## Description\n\nA TOCTOU race condition vulnerability exists in the `SoftFileLock` implementation of the filelock package. An attacker with local filesystem access and permission to create symlinks can exploit a race condition between the permission validation and file creation to cause lock operations to fail or behave unexpectedly.\n\nThe vulnerability occurs in the `_acquire()` method between `raise_on_not_writable_file()` (permission check) and `os.open()` (file creation). During this race window, an attacker can create a symlink at the lock file path, potentially causing the lock to operate on an unintended target file or leading to denial of service.\n\n### Attack Scenario\n\n```\n1. Lock attempts to acquire on /tmp/app.lock\n2. Permission validation passes\n3. [RACE WINDOW] - Attacker creates: ln -s /tmp/important.txt /tmp/app.lock\n4. os.open() tries to create lock file\n5. Lock operates on attacker-controlled target file or fails\n```\n\n---\n\n## Impact\n\n_What kind of vulnerability is it? Who is impacted?_\n\nThis is a **Time-of-Check-Time-of-Use (TOCTOU) race condition vulnerability** affecting any application using `SoftFileLock` for inter-process synchronization.\n\n**Affected Users:**\n- Applications using `filelock.SoftFileLock` directly\n- Applications using the fallback `FileLock` on systems without `fcntl` support (e.g., GraalPy)\n\n**Consequences:**\n- **Silent lock acquisition failure** - applications may not detect that exclusive resource access is not guaranteed\n- **Denial of Service** - attacker can prevent lock file creation by maintaining symlink\n- **Resource serialization failures** - multiple processes may acquire \"locks\" simultaneously\n- **Unintended file operations** - lock could operate on attacker-controlled files\n\n**CVSS v4.0 Score:** 5.6 (Medium)\n**Vector:** CVSS:4.0/AV:L/AT:L/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N\n\n**Attack Requirements:**\n- Local filesystem access to the directory containing lock files\n- Permission to create symlinks (standard for regular unprivileged users on Unix/Linux)\n- Ability to time the symlink creation during the narrow race window\n\n---\n\n## Patches\n\n_Has the problem been patched? What versions should users upgrade to?_\n\nYes, the vulnerability has been patched by adding the `O_NOFOLLOW` flag to prevent symlink following during lock file creation.\n\n**Patched Version:** Next release (commit: 255ed068bc85d1ef406e50a135e1459170dd1bf0)\n\n**Mitigation Details:**\n- The `O_NOFOLLOW` flag is added conditionally and gracefully degrades on platforms without support\n- On platforms with `O_NOFOLLOW` support (most modern systems): symlink attacks are completely prevented\n- On platforms without `O_NOFOLLOW` (e.g., GraalPy): TOCTOU window remains but is documented\n\n**Users should:**\n- Upgrade to the patched version when available\n- For critical deployments, consider using `UnixFileLock` or `WindowsFileLock` instead of the fallback `SoftFileLock`\n\n---\n\n## Workarounds\n\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nFor users unable to update immediately:\n\n1. **Avoid `SoftFileLock` in security-sensitive contexts** - use `UnixFileLock` or `WindowsFileLock` when available (these were already patched for CVE-2025-68146)\n\n2. **Restrict filesystem permissions** - prevent untrusted users from creating symlinks in lock file directories:\n   ```bash\n   chmod 700 /path/to/lock/directory\n   ```\n\n3. **Use process isolation** - isolate untrusted code from lock file paths to prevent symlink creation\n\n4. **Monitor lock operations** - implement application-level checks to verify lock acquisitions are successful before proceeding with critical operations\n\n---\n\n## References\n\n_Are there any links users can visit to find out more?_\n\n- **Similar Vulnerability:** CVE-2025-68146 (TOCTOU vulnerability in UnixFileLock/WindowsFileLock)\n- **CWE-362 (Concurrent Execution using Shared Resource):** https://cwe.mitre.org/data/definitions/362.html\n- **CWE-367 (Time-of-check Time-of-use Race Condition):** https://cwe.mitre.org/data/definitions/367.html\n- **CWE-59 (Improper Link Resolution Before File Access):** https://cwe.mitre.org/data/definitions/59.html\n- **O_NOFOLLOW documentation:** https://man7.org/linux/man-pages/man2/open.2.html\n- **GitHub Repository:** https://github.com/tox-dev/filelock\n\n---\n\n**Reported by:** George Tsigourakos (@tsigouris007)",
  "id": "GHSA-qmgc-5h2g-mvrw",
  "modified": "2026-01-13T18:44:55Z",
  "published": "2026-01-13T18:44:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-qmgc-5h2g-mvrw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22701"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tox-dev/filelock/commit/255ed068bc85d1ef406e50a135e1459170dd1bf0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tox-dev/filelock/commit/41b42dd2c72aecf7da83dbda5903b8087dddc4d5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tox-dev/filelock"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock"
}

GHSA-QMMC-JPPF-32WV

Vulnerability from github – Published: 2022-02-15 00:41 – Updated: 2021-05-20 21:02
VLAI
Summary
Directory Traversal in Docker
Details

Docker before 1.3.3 does not properly validate image IDs, which allows remote attackers to conduct path traversal attacks and spoof repositories via a crafted image in a (1) "docker load" operation or (2) "registry communications."

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/docker/docker"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2014-9358"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-20T21:02:14Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Docker before 1.3.3 does not properly validate image IDs, which allows remote attackers to conduct path traversal attacks and spoof repositories via a crafted image in a (1) \"docker load\" operation or (2) \"registry communications.\"",
  "id": "GHSA-qmmc-jppf-32wv",
  "modified": "2021-05-20T21:02:14Z",
  "published": "2022-02-15T00:41:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-9358"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/cve-2014-9358"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/forum/#!msg/docker-user/nFAz-B-n4Bw/0wr3wvLsnUwJ"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/forum/#%21msg/docker-user/nFAz-B-n4Bw/0wr3wvLsnUwJ"
    },
    {
      "type": "WEB",
      "url": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9358"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/534215/100/0/threaded"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Directory Traversal in Docker"
}

GHSA-QPCR-J696-V456

Vulnerability from github – Published: 2022-05-24 17:06 – Updated: 2023-02-02 21:34
VLAI
Details

The default event handling scripts in Automatic Bug Reporting Tool (ABRT) allow local users to gain privileges as demonstrated by a symlink attack on a var_log_messages file.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2015-1869"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-01-14T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "The default event handling scripts in Automatic Bug Reporting Tool (ABRT) allow local users to gain privileges as demonstrated by a symlink attack on a var_log_messages file.",
  "id": "GHSA-qpcr-j696-v456",
  "modified": "2023-02-02T21:34:01Z",
  "published": "2022-05-24T17:06:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-1869"
    },
    {
      "type": "WEB",
      "url": "https://github.com/abrt/abrt/commit/3287aa12eb205cff95cdd00d6d6c5c9a4f8f0eca"
    },
    {
      "type": "WEB",
      "url": "https://github.com/abrt/abrt/commit/7417505e1d93cc95ec648b74e3c801bc67aacb9f"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2015:1083"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2015:1210"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2015-1869"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1212861"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2015/04/17/5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.