Vulnerability-Lookup

CVE-2026-54719 (GCVE-0-2026-54719)

Vulnerability from cvelistv5 – Published: 2026-07-28 21:58 – Updated: 2026-07-29 12:32

Title

goshs: File-based .goshs ACL authorization bypass via the ?bulk zip-download route (unauthenticated read; residual of CVE-2026-40189)

Summary

goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.1, the httpserver/updown.go bulkDownload handler for ?bulk&file= ZIP downloads did not call findEffectiveACL or applyCustomAuth, allowing unauthenticated reads of files protected only by .goshs folder ACLs and block lists. This issue is fixed in version 2.1.1. This vulnerability exists due to an incomplete fix for CVE-2026-40189.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization
CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/goshs-labs/goshs/security/advi…	x_refsource_CONFIRM
https://github.com/goshs-labs/goshs/commit/7cf911…	x_refsource_MISC
https://github.com/goshs-labs/goshs/releases/tag/v2.1.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
goshs-labs	goshs	Affected: < 2.1.1

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54719

Vulnerability from fkie_nvd - Published: 2026-07-28 23:17 - Updated: 2026-07-29 13:19

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/goshs-labs/goshs/commit/7cf911a26ace737e1a55b7dc073e307a25f7fd1d
	security-advisories@github.com	https://github.com/goshs-labs/goshs/releases/tag/v2.1.1
	security-advisories@github.com	https://github.com/goshs-labs/goshs/security/advisories/GHSA-rmxw-pq4x-3fvh
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/goshs-labs/goshs/security/advisories/GHSA-rmxw-pq4x-3fvh

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "goshs",
          "vendor": "goshs-labs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.1, the httpserver/updown.go bulkDownload handler for ?bulk\u0026file= ZIP downloads did not call findEffectiveACL or applyCustomAuth, allowing unauthenticated reads of files protected only by .goshs folder ACLs and block lists. This issue is fixed in version 2.1.1. This vulnerability exists due to an incomplete fix for CVE-2026-40189."
    }
  ],
  "id": "CVE-2026-54719",
  "lastModified": "2026-07-29T13:19:00.653",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
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          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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        },
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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    "ssvcV203": [
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      "url": "https://github.com/goshs-labs/goshs/commit/7cf911a26ace737e1a55b7dc073e307a25f7fd1d"
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GHSA-RMXW-PQ4X-3FVH

Vulnerability from github – Published: 2026-07-28 21:59 – Updated: 2026-07-28 21:59

Summary

goshs: File-based .goshs ACL authorization bypass via the ?bulk zip-download route (unauthenticated read; residual of GHSA-wvhv-qcqf-f3cx)

Details

GHSA-wvhv-qcqf-f3cx fixed the per-folder .goshs ACL bypass on the state-changing routes (PUT/POST upload/?mkdir/?delete) and added recursive ACL resolution, and its description states the read/list path correctly enforces .goshs. That premise does not hold for the ?bulk zip-download route. bulkDownload (httpserver/updown.go) takes one or more ?file= parameters, runs each through sanitizePath(fs.Webroot, file), and streams the contents back as a ZIP without ever calling findEffectiveACL/applyCustomAuth. It is dispatched from earlyBreakParameters (?bulk) before the normal doDir/doFile/sendFile flow that performs the ACL check. An unauthenticated attacker can therefore read any file under the webroot protected solely by a .goshs ACL, bypassing both the folder auth (401 on the normal path) and the per-file block list (404 on the normal path). Same authorization-inconsistency root cause as the original advisory, surviving on a read route the fix did not cover.

Proof of concept (live, against the fixed v2.1.0 build which includes fix commit f212c4f4, served with no global -b auth, only a per-folder .goshs): GET /protected/secret.txt -> 401 (ACL enforced on normal path) GET /protected/secret.txt -u admin:admin -> 200 GET /?bulk&file=/protected/secret.txt -> 200, zip contains the protected file contents (BYPASS) GET /?bulk&file=/protected/blocked.txt -> 200, zip contains the block-listed file (block bypass) GET /protected/secret.txt?share -> 403 'Sharing disabled when auth is disabled' (correctly gated, NOT a bypass)

Impact: any unauthenticated network attacker can read files an operator protected with the documented per-folder .goshs ACL/basic-auth feature, by requesting them through ?bulk. Confidentiality only (the write/delete equivalents were closed by GHSA-wvhv-qcqf-f3cx). Applies to deployments relying on .goshs as the access boundary (a server-wide -b basic auth, if configured, also gates ?bulk via its middleware).

Remediation: enforce the effective .goshs ACL inside bulkDownload for every requested file exactly as sendFile/processDir do (resolve findEffectiveACL(filepath.Dir(absPath)) + applyCustomAuth + honor acl.Block), or route ?bulk through the same authorization gate as the normal read path. Audit ?cbDown and other alternate read routes for the same gap.

Credit: anir0y (independent security research).

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/patrickhener/goshs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.1.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/patrickhener/goshs/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "goshs.de/goshs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
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        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.1.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "goshs.de/goshs/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54719"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-28T21:59:48Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "GHSA-wvhv-qcqf-f3cx fixed the per-folder .goshs ACL bypass on the state-changing routes (PUT/POST upload/?mkdir/?delete) and added recursive ACL resolution, and its description states the read/list path correctly enforces .goshs. That premise does not hold for the ?bulk zip-download route. bulkDownload (httpserver/updown.go) takes one or more ?file= parameters, runs each through sanitizePath(fs.Webroot, file), and streams the contents back as a ZIP without ever calling findEffectiveACL/applyCustomAuth. It is dispatched from earlyBreakParameters (?bulk) before the normal doDir/doFile/sendFile flow that performs the ACL check. An unauthenticated attacker can therefore read any file under the webroot protected solely by a .goshs ACL, bypassing both the folder auth (401 on the normal path) and the per-file block list (404 on the normal path). Same authorization-inconsistency root cause as the original advisory, surviving on a read route the fix did not cover.\n\nProof of concept (live, against the fixed v2.1.0 build which includes fix commit f212c4f4, served with no global -b auth, only a per-folder .goshs):\n  GET /protected/secret.txt              -\u003e 401 (ACL enforced on normal path)\n  GET /protected/secret.txt -u admin:admin -\u003e 200\n  GET /?bulk\u0026file=/protected/secret.txt  -\u003e 200, zip contains the protected file contents  (BYPASS)\n  GET /?bulk\u0026file=/protected/blocked.txt -\u003e 200, zip contains the block-listed file        (block bypass)\n  GET /protected/secret.txt?share        -\u003e 403 \u0027Sharing disabled when auth is disabled\u0027    (correctly gated, NOT a bypass)\n\nImpact: any unauthenticated network attacker can read files an operator protected with the documented per-folder .goshs ACL/basic-auth feature, by requesting them through ?bulk. Confidentiality only (the write/delete equivalents were closed by GHSA-wvhv-qcqf-f3cx). Applies to deployments relying on .goshs as the access boundary (a server-wide -b basic auth, if configured, also gates ?bulk via its middleware).\n\nRemediation: enforce the effective .goshs ACL inside bulkDownload for every requested file exactly as sendFile/processDir do (resolve findEffectiveACL(filepath.Dir(absPath)) + applyCustomAuth + honor acl.Block), or route ?bulk through the same authorization gate as the normal read path. Audit ?cbDown and other alternate read routes for the same gap.\n\nCredit: anir0y (independent security research).",
  "id": "GHSA-rmxw-pq4x-3fvh",
  "modified": "2026-07-28T21:59:48Z",
  "published": "2026-07-28T21:59:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/goshs-labs/goshs/security/advisories/GHSA-rmxw-pq4x-3fvh"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goshs-labs/goshs/commit/7cf911a26ace737e1a55b7dc073e307a25f7fd1d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/goshs-labs/goshs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/goshs-labs/goshs/releases/tag/v2.1.1"
    }
  ],
  "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"
    }
  ],
  "summary": "goshs: File-based .goshs ACL authorization bypass via the ?bulk zip-download route (unauthenticated read; residual of GHSA-wvhv-qcqf-f3cx)"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-54719 (GCVE-0-2026-54719)

FKIE_CVE-2026-54719

GHSA-RMXW-PQ4X-3FVH

Tags

Sightings

Nomenclature