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Common Weakness Enumeration

CWE-61

Allowed

UNIX Symbolic Link (Symlink) Following

Abstraction: Compound · Status: Incomplete

API response cwe.mitre.org

The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.

301 vulnerabilities reference this CWE, most recent first.

CVE-2026-52811 (GCVE-0-2026-52811)

Vulnerability from cvelistv5 – Published: 2026-06-24 20:31 – Updated: 2026-06-26 03:55
VLAI
Title
Gogs: UploadRepoFiles writes outside repo working tree via committed parent sym
Summary
Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component — UploadRepoFiles is the lone outlier. An attacker with repo-write access plus a multipart upload whose filename contains a literal backslash (preserved by filepath.Base on Linux, then converted to / by pathx.Clean) redirects the write through a previously-committed directory symlink. iox.CopyFile opens the destination with os.Create (no O_NOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorized_keys → SSH foothold, or <repo>.git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3.
Severity
9 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
gogs gogs Affected: < 0.14.3
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CVE-2026-49248 (GCVE-0-2026-49248)

Vulnerability from cvelistv5 – Published: 2026-06-18 19:54 – Updated: 2026-06-22 14:41
VLAI
Title
OneDev: RCE through absolute-path symlink following allows low-privileged users to overwrite arbitrary server via TarUtils.untar
Summary
OneDev is a Git server with CI/CD, kanban, and packages. In versions 15.0.6 and below, TarUtils.untar() creates symbolic links verbatim from TAR entry getLinkName() without validating whether the target is an absolute path. A subsequent file entry in the same archive traverses the symlink, writing to arbitrary server-side locations. This is exploitable by any authenticated user with CI Job write access — no admin interaction required. This is an incomplete fix bypass of CVE-2021-21251 (GHSA-2w6j-wc8c-9mq2): that patch blocked .. path segments but did not address absolute symlink targets. This issue has been fixed in version 15.0.7.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 14:40 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
theonedev onedev Affected: < 15.0.7
Create a notification for this product.
Show details on NVD website
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CVE-2026-47766 (GCVE-0-2026-47766)

Vulnerability from cvelistv5 – Published: 2026-08-14 16:16 – Updated: 2026-08-14 16:32
VLAI
Title
crun follows rootfs /dev symlink while creating default devices
Summary
crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.
Severity
5.1 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:32 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
containers crun Affected: < 1.28
Create a notification for this product.
Show details on NVD website
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CVE-2026-47763 (GCVE-0-2026-47763)

Vulnerability from cvelistv5 – Published: 2026-08-04 17:29 – Updated: 2026-08-05 15:00
VLAI
Title
pdm: Project-Local State and Config Writes Follow Symlinks
Summary
pdm is a Python package and dependency manager supporting the latest PEP standards. In versions prior to 2.27.0, pdm writes several project-local state or configuration files without symlink protection. If a malicious repository places those files as symlinks, local PDM operations can overwrite the symlink targets. This creates an arbitrary file clobber primitive relative to the privileges of the invoking user. Config.__init__() resolves the project-local pdm.toml path and _save_config() writes to the resolved target. If PROJECT_ROOT/pdm.toml is a symlink to another file, pdm config -l ... updates the target file instead of refusing the write. The same general problem exists for other project-local persistence paths that are written directly with no lstat / O_NOFOLLOW protection. For the pdm.toml PoC specifically, the target file must already contain parseable TOML. Otherwise the load step fails before the write path is reached. That parser constraint does not apply to the .pdm-python or .python-version sinks. This issue has been fixed in version 2.27.0.
Severity
6.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 15:00 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
pdm-project pdm Affected: < 2.27.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-43570 (GCVE-0-2026-43570)

Vulnerability from cvelistv5 – Published: 2026-05-05 11:25 – Updated: 2026-05-06 14:13 X_Open Source
VLAI
Title
OpenClaw 2026.3.22 < 2026.4.5 - Symlink Traversal in Remote Marketplace Repository Path Handling
Summary
OpenClaw versions 2026.3.22 before 2026.4.5 contain a symlink traversal vulnerability in remote marketplace repository path handling that allows attackers to escape the expected repository root. Attackers can exploit this by providing crafted symlink paths to access files outside the intended repository directory.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 14:13 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 2026.3.22 , < 2026.4.5 (semver)
Unaffected: 2026.4.5 (semver)
    cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
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Date Public
2026-04-16 00:00
Credits
zsx (@zsxsoft) KeenSecurityLab
Show details on NVD website
To clipboard 

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CVE-2026-42306 (GCVE-0-2026-42306)

Vulnerability from cvelistv5 – Published: 2026-06-12 18:09 – Updated: 2026-06-13 03:25
VLAI
Title
Moby: Race condition in docker cp allows bind mount redirection to host path
Summary
Moby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior to version 2.0.0-beta.14, a race condition during docker cp mount setup allows a malicious container to redirect a bind mount target to an arbitrary host path, potentially overwriting host files or causing denial of service. This issue has been patched in Docker Engine version 29.5.1 and Moby Daemon version 2.0.0-beta.14.
Severity
7.2 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-13 03:25 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
moby moby Affected: github.com/docker/docker/daemon <= 28.5.2
Affected: Docker Engine < 29.5.1
Affected: github.com/moby/moby/v2/daemon < 2.0.0-beta.14
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Show details on NVD website
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CVE-2026-42275 (GCVE-0-2026-42275)

Vulnerability from cvelistv5 – Published: 2026-05-08 03:45 – Updated: 2026-05-08 12:13
VLAI
Title
zrok: WebDAV drive backend follows symlinks outside DriveRoot, enabling host filesystem read/write
Summary
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following. When a symbolic link inside the shared DriveRoot points to a location outside that root, remote WebDAV consumers can read files and—on shares without OS-level permission restrictions—write or overwrite files anywhere on the host filesystem accessible to the zrok process. This issue has been patched in version 2.0.2.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-08 12:13 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
openziti zrok Affected: < 2.0.2
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Show details on NVD website
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CVE-2026-41937 (GCVE-0-2026-41937)

Vulnerability from cvelistv5 – Published: 2026-05-14 14:30 – Updated: 2026-07-28 01:48 X_Open Source
VLAI
Title
Vvveb < 1.0.8.3 Unrestricted File Upload RCE via Plugin Upload
Summary
Vvveb before 1.0.8.3 contains an unrestricted file upload vulnerability in the plugin upload endpoint that allows super_admin users to execute arbitrary PHP code by uploading a malicious plugin ZIP file. Attackers can craft a ZIP containing a plugin.php with a valid Slug header and a public/index.php file with arbitrary PHP code, which executes as the web server user once accessed via subsequent unauthenticated HTTP requests to the plugin's public path.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 19:01 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
givanz Vvveb Affected: 0 , < 1.0.8.3 (custom)
Unaffected: 04f0294350ec429e307cd31c2e777a4797c868d6 (git)
    cpe:2.3:a:vvveb:vvveb:*:*:*:*:*:*:*:*
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Date Public
2026-05-13 00:00
Credits
Basant Kumar (@CyberWarrior9) VulnCheck
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CVE-2026-41579 (GCVE-0-2026-41579)

Vulnerability from cvelistv5 – Published: 2026-07-01 00:02 – Updated: 2026-07-01 13:35
VLAI
Title
runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations
Summary
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 13:34 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
Impacted products
Vendor Product Version
opencontainers runc Affected: < 1.3.6
Affected: >= 1.4.0-rc.1, < 1.4.3
Affected: >= 1.5.0-rc.1, < 1.5.0-rc.3
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Show details on NVD website
To clipboard 

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CVE-2026-41326 (GCVE-0-2026-41326)

Vulnerability from cvelistv5 – Published: 2026-04-24 18:46 – Updated: 2026-09-01 12:04
VLAI
Title
Kata Containers: CopyFile Policy Subversion via Symlinks
Summary
Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.
Severity
8.2 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:43 UTC
CWE
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
  • CWE-1220 - Insufficient Granularity of Access Control
Assigner
References
Impacted products
Vendor Product Version
kata-containers kata-containers Affected: >= 3.4.0, < 3.29.0
Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.19 Unaffected: 4.19.9.6.202606100451-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.19::el9
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Red Hat Confidential Compute Attestation     cpe:/a:redhat:confidential_compute_attestation:1
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-41326"
          },
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            "name": "RHBZ#2460859",
            "tags": [
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              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460859"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41326.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
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            "url": "https://access.redhat.com/errata/RHSA-2026:25200"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:25200: Red Hat OpenShift Container Platform 4.19"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-04-22T19:00:36.343Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-04-22T19:01:25.112Z",
            "value": "Made public."
          }
        ],
        "title": "kata-containers: Arbitrary file write inside guest image via CopyFile policy",
        "workarounds": [
          {
            "lang": "en",
            "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
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      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kata-containers",
          "vendor": "kata-containers",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.4.0, \u003c 3.29.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-61",
              "description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-04T16:03:37.932Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc",
          "tags": [
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          ],
          "url": "https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc"
        },
        {
          "name": "https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2",
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      ],
      "source": {
        "advisory": "GHSA-q49m-57vm-c8cc",
        "discovery": "UNKNOWN"
      },
      "title": "Kata Containers: CopyFile Policy Subversion via Symlinks"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-41326",
    "datePublished": "2026-04-24T18:46:21.993Z",
    "dateReserved": "2026-04-20T14:01:46.672Z",
    "dateUpdated": "2026-09-01T12:04:43.177Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation
Implementation

Symbolic link attacks often occur when a program creates a tmp directory that stores files/links. Access to the directory should be restricted to the program as to prevent attackers from manipulating the files.

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-27: Leveraging Race Conditions via Symbolic Links

This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.

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