Vulnerability-Lookup

CVE-2026-74907 (GCVE-0-2026-74907)

Vulnerability from cvelistv5 – Published: 2026-08-18 11:19 – Updated: 2026-10-08 15:24

Title

Grav before 2.0.15 Path Traversal via plugin-asset-map.php

Summary

Grav before 2.0.15 contains a path traversal vulnerability in the static asset server within index.php that uses string prefix matching instead of directory-boundary validation. Unauthenticated attackers can access files in sibling directories by exploiting directory names that extend the base path string, such as requesting assets-secret when assets is the configured base.

Severity

8.2 (High)


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

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 2026-08-18 12:51 UTC

CWE

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

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 5848 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/getgrav/grav/security/advisori…	vendor-advisory
https://www.vulncheck.com/advisories/grav-before-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
getgrav	grav	Affected: 0 , < 2.0.15 (semver) Unaffected: 2.0.15 (semver) cpe:2.3:a:getgrav:grav::::::::

Date Public

2026-08-03 00:00

Credits

alham-rizvi

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-74907

Vulnerability from fkie_nvd - Published: 2026-08-18 12:19 - Updated: 2026-10-08 16:17

Severity

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/getgrav/grav/security/advisories/GHSA-4v9q-p283-qc2m
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/grav-before-path-traversal-via-plugin-asset-map-php

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T12:51:20.275069Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-18T12:19:31.047",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-4v9q-p283-qc2m"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/grav-before-path-traversal-via-plugin-asset-map-php"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-2RHW-8953-48Q3

Vulnerability from github – Published: 2026-08-18 12:31 – Updated: 2026-09-17 20:42

Withdrawn 2026-09-17

Summary

Duplicate Advisory: Grav: Unauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-4v9q-p283-qc2m. This link is maintained to preserve external references.

Original Description

Severity

5.9 (Medium)


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

8.2 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 2.0.15"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "getgrav/grav"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-17T20:42:56Z",
    "nvd_published_at": "2026-08-18T12:19:31Z",
    "severity": "HIGH"
  },
  "details": "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-4v9q-p283-qc2m. This link is maintained to preserve external references.\n\n### Original Description\nGrav before 2.0.15 contains a path traversal vulnerability in the static asset server within index.php that uses string prefix matching instead of directory-boundary validation. Unauthenticated attackers can access files in sibling directories by exploiting directory names that extend the base path string, such as requesting assets-secret when assets is the configured base.",
  "id": "GHSA-2rhw-8953-48q3",
  "modified": "2026-09-17T20:42:56Z",
  "published": "2026-08-18T12:31:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-4v9q-p283-qc2m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74907"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/grav-before-path-traversal-via-plugin-asset-map-php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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"
    }
  ],
  "summary": "Duplicate Advisory: Grav: Unauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)",
  "withdrawn": "2026-09-17T20:42:56Z"
}

GHSA-4V9Q-P283-QC2M

Vulnerability from github – Published: 2026-09-17 20:43 – Updated: 2026-09-17 20:43

Summary

Grav: Unauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)

Details

Verified against: getgrav/grav devel branch, GRAV_VERSION = "2.0.15", file `index.php

Title

Unauthenticated Path Traversal via Missing Directory-Boundary Check in plugin-asset-map.php Static Asset Server (index.php)

Product / Affected Versions

Product: getgrav/grav
File: index.php (top-level front controller, runs before Grav itself boots)
Confirmed present in: devel branch, 2.0.15
Precondition: requires user/config/plugin-asset-map.php to exist and contain at least one route-prefix mapping ,this is an opt-in mechanism (per the code comment: "Fast static asset serving for plugins that bundle SPA apps"). No core mechanism generates this file automatically; it's created by a plugin that opts into this fast-path. Not reachable on a stock Grav install with no such plugin. Where reachable, it requires zero authentication.

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') , specific mechanism: a path-prefix containment check performed with plain string comparison (str_starts_with) instead of a directory-boundary-aware comparison, allowing escape into any sibling path whose name happens to extend the base directory's name as a string.

Description

index.php implements a fast-path static file server that runs before Grav's own routing/security stack, gated on the presence of an asset-map file:

$assetMapFile = __DIR__ . '/user/config/plugin-asset-map.php';
if (is_file($assetMapFile)) {
    $assetMap = require $assetMapFile;
    foreach ($assetMap as $routePrefix => $diskPath) {
        if (str_starts_with($path, $routePrefix)) {
            $relPath = substr($path, strlen($routePrefix));
            $filePath = __DIR__ . '/' . ltrim($diskPath, '/') . $relPath;
            $realFile = realpath($filePath);
            $realBase = realpath(__DIR__ . '/' . ltrim($diskPath, '/'));
            if ($realFile && $realBase && str_starts_with($realFile, $realBase) && is_file($realFile)) {
                // ... serves $realFile directly, with Content-Type inferred from extension
                readfile($realFile);
                exit;
            }
        }
    }
}

realpath() correctly resolves .. sequences, so a naive ../../etc/passwd-style traversal that leaves the filesystem entirely is blocked (it wouldn't share the $realBase string prefix). But the containment check itself, str_starts_with($realFile, $realBase), has no directory-boundary awareness it's a plain string-prefix test, not "is $realFile inside the $realBase directory." Any resolved path whose string representation merely begins with the same characters as $realBase passes, including sibling directories that extend the base directory's name (assets → assets-secret, assets.bak, assets_old, assets2, etc.) a very common real-world directory-naming pattern (backup dirs, versioned dirs, disabled/legacy dirs sitting alongside the active one).

Live Proof of Concept

Setup: the exact code block above, extracted verbatim from index.php, executed with PHP 8.3.6 against a realistic directory layout (a plugin's active assets/ dir sitting next to an unrelated assets-secret/ dir containing a fake secret):

user/plugins/myplugin/assets/app.js            <- intended, public
user/plugins/myplugin/assets-secret/config.php <- NOT intended to be served
user/config/plugin-asset-map.php:
    return ['/myplugin-assets' => 'user/plugins/myplugin/assets'];

Legitimate request (/myplugin-assets/app.js):

realFile: '/home/claude/grav-poc/user/plugins/myplugin/assets/app.js'
realBase: '/home/claude/grav-poc/user/plugins/myplugin/assets'
>>> WOULD SERVE FILE <<<
>>> Content: public asset content

Traversal request (/myplugin-assets/../assets-secret/config.php):

realFile: '/home/claude/grav-poc/user/plugins/myplugin/assets-secret/config.php'
realBase: '/home/claude/grav-poc/user/plugins/myplugin/assets'
>>> WOULD SERVE FILE <<<
>>> Content: SECRET_API_KEY=sk_live_totally_secret_12345

str_starts_with('.../assets-secret/config.php', '.../assets') evaluates true because assets-secret literally begins with the characters assets there is no separator-boundary check (e.g. requiring $realBase . '/' as the actual prefix) to prevent this.

Trust-boundary framing (per Grav's own SECURITY.md)

This code path requires no Grav account , it runs before Grav even initializes, directly off the raw request path. Per Grav's own stated criteria: "An unauthenticated attacker can achieve RCE, exfiltrate site data, or gain admin-equivalent control. No Grav account required" → this matches the CRITICAL bar exactly, for any deployment where the plugin-asset-map.php mechanism is in active use.

Suggested Fix

Append a trailing directory separator before the prefix comparison, or use a proper containment check:

if ($realFile && $realBase && (
    $realFile === $realBase ||
    str_starts_with($realFile, $realBase . DIRECTORY_SEPARATOR)
) && is_file($realFile)) {

This is the standard fix for this exact bug class , ensuring the matched prefix ends exactly at a directory boundary, not partway through a longer sibling name.

Severity

5.9 (Medium)


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

8.2 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.0.14"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "getgrav/grav"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-74907"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-17T20:43:16Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "**Verified against:** `getgrav/grav` devel branch, `GRAV_VERSION = \"2.0.15\"`, file `index.php\n\n## Title\nUnauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)\n\n## Product / Affected Versions\n- Product: `getgrav/grav`\n- File: `index.php` (top-level front controller, runs before Grav itself boots)\n- Confirmed present in: devel branch, 2.0.15\n- **Precondition:** requires `user/config/plugin-asset-map.php` to exist and contain at least one route-prefix mapping ,this is an opt-in mechanism (per the code comment: \"Fast static asset serving for plugins that bundle SPA apps\"). No core mechanism generates this file automatically; it\u0027s created by a plugin that opts into this fast-path. **Not reachable on a stock Grav install with no such plugin.** Where reachable, it requires zero authentication.\n\n## CWE\nCWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027) , specific mechanism: a path-prefix containment check performed with plain string comparison (`str_starts_with`) instead of a directory-boundary-aware comparison, allowing escape into any sibling path whose name happens to extend the base directory\u0027s name as a string.\n\n## Description\n\n`index.php` implements a fast-path static file server that runs *before* Grav\u0027s own routing/security stack, gated on the presence of an asset-map file:\n\n```php\n$assetMapFile = __DIR__ . \u0027/user/config/plugin-asset-map.php\u0027;\nif (is_file($assetMapFile)) {\n    $assetMap = require $assetMapFile;\n    foreach ($assetMap as $routePrefix =\u003e $diskPath) {\n        if (str_starts_with($path, $routePrefix)) {\n            $relPath = substr($path, strlen($routePrefix));\n            $filePath = __DIR__ . \u0027/\u0027 . ltrim($diskPath, \u0027/\u0027) . $relPath;\n            $realFile = realpath($filePath);\n            $realBase = realpath(__DIR__ . \u0027/\u0027 . ltrim($diskPath, \u0027/\u0027));\n            if ($realFile \u0026\u0026 $realBase \u0026\u0026 str_starts_with($realFile, $realBase) \u0026\u0026 is_file($realFile)) {\n                // ... serves $realFile directly, with Content-Type inferred from extension\n                readfile($realFile);\n                exit;\n            }\n        }\n    }\n}\n```\n\n`realpath()` correctly resolves `..` sequences, so a naive `../../etc/passwd`-style traversal that leaves the filesystem entirely is blocked (it wouldn\u0027t share the `$realBase` string prefix). **But the containment check itself, `str_starts_with($realFile, $realBase)`, has no directory-boundary awareness** it\u0027s a plain string-prefix test, not \"is `$realFile` inside the `$realBase` directory.\" Any resolved path whose string representation merely *begins with* the same characters as `$realBase` passes, including sibling directories that extend the base directory\u0027s name (`assets` \u2192 `assets-secret`, `assets.bak`, `assets_old`, `assets2`, etc.) a very common real-world directory-naming pattern (backup dirs, versioned dirs, disabled/legacy dirs sitting alongside the active one).\n\n## Live Proof of Concept\n\n**Setup:** the exact code block above, extracted verbatim from `index.php`, executed with PHP 8.3.6 against a realistic directory layout (a plugin\u0027s active `assets/` dir sitting next to an unrelated `assets-secret/` dir containing a fake secret):\n\n```\nuser/plugins/myplugin/assets/app.js            \u003c- intended, public\nuser/plugins/myplugin/assets-secret/config.php \u003c- NOT intended to be served\nuser/config/plugin-asset-map.php:\n    return [\u0027/myplugin-assets\u0027 =\u003e \u0027user/plugins/myplugin/assets\u0027];\n```\n\n**Legitimate request** (`/myplugin-assets/app.js`):\n```\nrealFile: \u0027/home/claude/grav-poc/user/plugins/myplugin/assets/app.js\u0027\nrealBase: \u0027/home/claude/grav-poc/user/plugins/myplugin/assets\u0027\n\u003e\u003e\u003e WOULD SERVE FILE \u003c\u003c\u003c\n\u003e\u003e\u003e Content: public asset content\n```\n\n**Traversal request** (`/myplugin-assets/../assets-secret/config.php`):\n```\nrealFile: \u0027/home/claude/grav-poc/user/plugins/myplugin/assets-secret/config.php\u0027\nrealBase: \u0027/home/claude/grav-poc/user/plugins/myplugin/assets\u0027\n\u003e\u003e\u003e WOULD SERVE FILE \u003c\u003c\u003c\n\u003e\u003e\u003e Content: SECRET_API_KEY=sk_live_totally_secret_12345\n```\n\n`str_starts_with(\u0027.../assets-secret/config.php\u0027, \u0027.../assets\u0027)` evaluates `true` because `assets-secret` literally begins with the characters `assets` there is no separator-boundary check (e.g. requiring `$realBase . \u0027/\u0027` as the actual prefix) to prevent this.\n\n## Trust-boundary framing (per Grav\u0027s own SECURITY.md)\nThis code path requires **no Grav account** , it runs before Grav even initializes, directly off the raw request path. Per Grav\u0027s own stated criteria: *\"An unauthenticated attacker can achieve RCE, exfiltrate site data, or gain admin-equivalent control. No Grav account required\"* \u2192 this matches the **CRITICAL** bar exactly, for any deployment where the `plugin-asset-map.php` mechanism is in active use.\n\n## Suggested Fix\nAppend a trailing directory separator before the prefix comparison, or use a proper containment check:\n```php\nif ($realFile \u0026\u0026 $realBase \u0026\u0026 (\n    $realFile === $realBase ||\n    str_starts_with($realFile, $realBase . DIRECTORY_SEPARATOR)\n) \u0026\u0026 is_file($realFile)) {\n```\nThis is the standard fix for this exact bug class\n, ensuring the matched prefix ends exactly at a directory boundary, not partway through a longer sibling name.",
  "id": "GHSA-4v9q-p283-qc2m",
  "modified": "2026-09-17T20:43:16Z",
  "published": "2026-09-17T20:43:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-4v9q-p283-qc2m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74907"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/getgrav/grav"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/grav-before-path-traversal-via-plugin-asset-map-php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Grav: Unauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)"
}

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.

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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.
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CVE-2026-74907 (GCVE-0-2026-74907)

FKIE_CVE-2026-74907

GHSA-2RHW-8953-48Q3

Duplicate Advisory

Original Description

GHSA-4V9Q-P283-QC2M

Title

Product / Affected Versions

CWE

Description

Live Proof of Concept

Trust-boundary framing (per Grav's own SECURITY.md)

Suggested Fix

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour