Vulnerability-Lookup

GHSA-2M67-CXXQ-C3H8

Vulnerability from github – Published: 2026-03-12 16:37 – Updated: 2026-03-13 13:36

Summary

ZeptoClaw: Path boundary checks bypass via symlink, TOCTOU, and hardlink

Details

Summary

Workspace boundary enforcement currently has three related bypass risks. This issue tracks fixing all three in one pull request.

Details

R1 - Dangling Symlink Component Bypass

What happens: Path validation can miss dangling symlink components during traversal checks.
Why it matters: A symlink that is unresolved at validation time can later resolve to an external location.
Impact: Read and write operations may escape workspace boundaries.
Affected area: src/security/path.rs (check_symlink_escape).

R2 - TOCTOU Between Validation and Use

What happens: The path is validated first, then used later for filesystem operations.
Why it matters: A concurrent filesystem change can swap path components after validation but before open/write.
Impact: Race-based workspace escape is possible.
Affected area: Filesystem and file-consuming tools that call validate_path_in_workspace before I/O.

R3 - Hardlink Alias Bypass

What happens: A file inside workspace can be a hardlink to an inode outside the intended workspace trust boundary.
Why it matters: Prefix and symlink checks can pass while data access still mutates or reads external content.
Impact: Policy bypass for read/write operations.
Affected area: Any tool that reads or writes via validated paths.

Risk Matrix

ID	Risk	Severity	Likelihood	Impact
R1	Dangling symlink component bypass	High	Medium	Workspace boundary escape for read/write
R2	Validate/use TOCTOU race	High	Medium	Race-based boundary escape during file I/O
R3	Hardlink alias bypass	Medium	Low-Medium	External inode read/write through in-workspace path

PoC

R1 - Dangling symlink component bypass

Create a symlink inside workspace pointing to a missing target.
Validate a path traversing that symlink.
Create the target directory outside workspace after validation.
Perform file operation and observe potential boundary escape if not fail-closed.

R2 - TOCTOU between validation and use

Validate a candidate in-workspace path.
Before open/write, replace an intermediate component with a link to external location.
Continue with the file operation.
Observe boundary escape if operation trusts only stale validation result.

R3 - Hardlink alias bypass

Place a hardlink inside workspace that points to an external inode.
Validate the in-workspace hardlink path.
Read or write through this path.
Observe external inode access through a path that appears in-scope.

Impacts

Unauthorized cross path boundary

Credit

@zpbrent

Patch

f50c17e11ae3e2d40c96730abac41974ef2ee2a8

Severity

8.8 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.7.5"
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "zeptoclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32232"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-62"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-12T16:37:49Z",
    "nvd_published_at": "2026-03-12T19:16:17Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nWorkspace boundary enforcement currently has three related bypass risks. This issue tracks fixing all three in one pull request.\n\n### Details\n\n#### R1 - Dangling Symlink Component Bypass\n- What happens: Path validation can miss dangling symlink components during traversal checks.\n- Why it matters: A symlink that is unresolved at validation time can later resolve to an external location.\n- Impact: Read and write operations may escape workspace boundaries.\n- Affected area: src/security/path.rs (check_symlink_escape).\n\n#### R2 - TOCTOU Between Validation and Use\n- What happens: The path is validated first, then used later for filesystem operations.\n- Why it matters: A concurrent filesystem change can swap path components after validation but before open/write.\n- Impact: Race-based workspace escape is possible.\n- Affected area: Filesystem and file-consuming tools that call validate_path_in_workspace before I/O.\n\n#### R3 - Hardlink Alias Bypass\n- What happens: A file inside workspace can be a hardlink to an inode outside the intended workspace trust boundary.\n- Why it matters: Prefix and symlink checks can pass while data access still mutates or reads external content.\n- Impact: Policy bypass for read/write operations.\n- Affected area: Any tool that reads or writes via validated paths.\n\n#### Risk Matrix\n\n| ID | Risk | Severity | Likelihood | Impact |\n|---|---|---|---|---|\n| R1 | Dangling symlink component bypass | High | Medium | Workspace boundary escape for read/write |\n| R2 | Validate/use TOCTOU race | High | Medium | Race-based boundary escape during file I/O |\n| R3 | Hardlink alias bypass | Medium | Low-Medium | External inode read/write through in-workspace path |\n\n### PoC\n\n#### R1 - Dangling symlink component bypass\n1. Create a symlink inside workspace pointing to a missing target.\n2. Validate a path traversing that symlink.\n3. Create the target directory outside workspace after validation.\n4. Perform file operation and observe potential boundary escape if not fail-closed.\n\n#### R2 - TOCTOU between validation and use\n1. Validate a candidate in-workspace path.\n2. Before open/write, replace an intermediate component with a link to external location.\n3. Continue with the file operation.\n4. Observe boundary escape if operation trusts only stale validation result.\n\n#### R3 - Hardlink alias bypass\n1. Place a hardlink inside workspace that points to an external inode.\n2. Validate the in-workspace hardlink path.\n3. Read or write through this path.\n4. Observe external inode access through a path that appears in-scope.\n\n### Impacts\nUnauthorized cross path boundary\n\n## Credit\n[@zpbrent](https://github.com/zpbrent)\n\n### Patch\n[f50c17e11ae3e2d40c96730abac41974ef2ee2a8](https://github.com/qhkm/zeptoclaw/commit/f50c17e11ae3e2d40c96730abac41974ef2ee2a8)",
  "id": "GHSA-2m67-cxxq-c3h8",
  "modified": "2026-03-13T13:36:00Z",
  "published": "2026-03-12T16:37:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/qhkm/zeptoclaw/security/advisories/GHSA-2m67-cxxq-c3h8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32232"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qhkm/zeptoclaw/pull/324"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qhkm/zeptoclaw/commit/bf004a20d3687a0c1a9e052ec79536e30d6de134"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qhkm/zeptoclaw/commit/f50c17e11ae3e2d40c96730abac41974ef2ee2a8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/qhkm/zeptoclaw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qhkm/zeptoclaw/releases/tag/v0.7.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ZeptoClaw: Path boundary checks bypass via symlink, TOCTOU, and hardlink"
}

CVE-2026-32232 (GCVE-0-2026-32232)

Vulnerability from cvelistv5 – Published: 2026-03-12 18:24 – Updated: 2026-03-12 20:46

Title

ZeptoClaw: Path boundary checks bypass via symlink, TOCTOU, and hardlink

Summary

ZeptoClaw is a personal AI assistant. Prior to 0.7.6, there is a Dangling Symlink Component Bypass, TOCTOU Between Validation and Use, and Hardlink Alias Bypass. This vulnerability is fixed in 0.7.6.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-12 20:39 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-62 - UNIX Hard Link

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7730 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/qhkm/zeptoclaw/security/adviso…	x_refsource_CONFIRM
https://github.com/qhkm/zeptoclaw/commit/f50c17e1…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
qhkm	zeptoclaw	Affected: < 0.7.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32232",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-12T20:39:17.690556Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-12T20:46:56.857Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "zeptoclaw",
          "vendor": "qhkm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.7.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ZeptoClaw is a personal AI assistant. Prior to 0.7.6, there is a Dangling Symlink Component Bypass, TOCTOU Between Validation and Use, and Hardlink Alias Bypass. This vulnerability is fixed in 0.7.6."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-62",
              "description": "CWE-62: UNIX Hard Link",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-12T18:24:35.225Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/qhkm/zeptoclaw/security/advisories/GHSA-2m67-cxxq-c3h8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/qhkm/zeptoclaw/security/advisories/GHSA-2m67-cxxq-c3h8"
        },
        {
          "name": "https://github.com/qhkm/zeptoclaw/commit/f50c17e11ae3e2d40c96730abac41974ef2ee2a8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/qhkm/zeptoclaw/commit/f50c17e11ae3e2d40c96730abac41974ef2ee2a8"
        }
      ],
      "source": {
        "advisory": "GHSA-2m67-cxxq-c3h8",
        "discovery": "UNKNOWN"
      },
      "title": "ZeptoClaw: Path boundary checks bypass via symlink, TOCTOU, and hardlink"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-32232",
    "datePublished": "2026-03-12T18:24:35.225Z",
    "dateReserved": "2026-03-11T14:47:05.683Z",
    "dateUpdated": "2026-03-12T20:46:56.857Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-2M67-CXXQ-C3H8

Summary

Details

R1 - Dangling Symlink Component Bypass

R2 - TOCTOU Between Validation and Use

R3 - Hardlink Alias Bypass

Risk Matrix

PoC

R1 - Dangling symlink component bypass

R2 - TOCTOU between validation and use

R3 - Hardlink alias bypass

Impacts

Credit

Patch

CVE-2026-32232 (GCVE-0-2026-32232)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour