CVE-2026-45731: AVideo Authenticated Arbitrary File Read Vulnerability

MODERATE
Advisory Identifier: GHSA-3mjv-375j-6h92
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CVSS 4.9
CWE-22
Published
Advisory Summary

CVE-2026-45731 is a MODERATE (CVSS 4.9) authenticated arbitrary file read vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting AVideo libraries in the Packagist ecosystem. The issue involves authenticated arbitrary file read in view/update.php. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45731 at a Glance

CVE Identifier CVE-2026-45731
GHSA Identifier GHSA-3mjv-375j-6h92
Severity MODERATE
CVSS v3.1 Base Score 4.9
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product AVideo
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-45731

To remediate this vulnerability, upgrade all affected AVideo dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

WWBN/AVideo fixed: Latest secure release 
Upgrade WWBN/AVideo to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for WWBN/AVideo

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-45731, inspect your project dependencies for AVideo:

inspect dependencies for WWBN/AVideo

Analyze the terminal output to locate any version of AVideo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In AVideo, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary view/update.php reads $_POST['updateFile'] as a relative path under updatedb/ and passes it to PHP's file() for line-by-line execution as part of a database migration. An authenticated administrator can abuse this to read arbitrary text files reachable from the web-server process — especially valuable on misconfigured deployments where /etc/passwd, .env, or other sibling-app configs are reachable relative to the AVideo directory. ### Details view/update.php, lines 134-145 (excerpt): if (!empty($_POST['updateFile'])) { $dir = Video::getStoragePath() . "cache"; rrmdir($dir); /* …unrelated cache-clear… */ if (file_exists($logfile . "log")) { unlink($logfile . "log"); // ... } $lines = file("{$global['systemRootPath']}updatedb/{$_POST['updateFile']}"); The User::isAdmin() and adminSecurityCheck(true) guards at lines 12-15 enforce admin auth, but $_POST['updateFile'] is concatenated into a path without any sanitization. file() returns the file's contents as an array of lines; the script subsequently iterates them and echoes the SQL it would run. ### PoC POST /view/update.php Content-Type: application/x-www-form-urlencoded updateFile=../../../../etc/passwd Result: the script attempts to load /etc/passwd (relative to {systemRootPath}updatedb/), echoing each line in the migration-runner HTML output. $_POST['updateFile'] traversal accepted, no extension guard, no in-array whitelist. Attempting ../../../../proc/self/environ similarly reveals web-server environment variables on Linux. ### Impact Verified on the current master branch of WWBN/AVideo (commit bc0340662…). Likely affected: every release where view/update.php contains the $_POST['updateFile'] consumer — pattern predates 2024.

CVE-2026-45731 Affected AVideo Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
WWBN/AVideo
 Packagist
≤ 29.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/WWBN/AVideo/security/advisories/GHSA-3mjv-375j-6h92
NVD — CVE-2026-45731 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45731
AVideo Source Repository REPOSITORY
https://github.com/WWBN/AVideo

Frequently Asked Questions

What is CVE-2026-45731?
CVE-2026-45731 is a security vulnerability in AVideo involving Authenticated Arbitrary File Read in view/update.php under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which AVideo versions are affected?
Affected versions include releases prior to current release patches across affected packages: WWBN/AVideo.
What version fixes CVE-2026-45731?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is WWBN/AVideo affected?
Yes, WWBN/AVideo is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-45731?
CVE-2026-45731 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-45731?
CVE-2026-45731 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Packagist dependencies for CVE-2026-45731?
Run the dependency tree command: 'inspect dependencies for WWBN/AVideo'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3mjv-375j-6h92",
  "modified" : "2026-06-09T10:28:38Z",
  "published" : "2026-05-18T19:01:59Z",
  "aliases" : [ "CVE-2026-45731" ],
  "summary" : "AVideo: Authenticated Arbitrary File Read in view/update.php",
  "details" : "### Summary\nview/update.php reads $_POST['updateFile'] as a relative path under updatedb/ and passes it to PHP's file() for line-by-line execution as part of a database migration. An authenticated administrator can abuse this to read arbitrary text files reachable from the web-server process — especially valuable on misconfigured deployments where /etc/passwd, .env, or other sibling-app configs are reachable relative to the AVideo directory.\n\n### Details\nview/update.php, lines 134-145 (excerpt):\n\nif (!empty($_POST['updateFile'])) {\n    $dir = Video::getStoragePath() . \"cache\";\n    rrmdir($dir);\n    /* …unrelated cache-clear… */\n\n    if (file_exists($logfile . \"log\")) {\n        unlink($logfile . \"log\");\n        // ...\n    }\n    $lines = file(\"{$global['systemRootPath']}updatedb/{$_POST['updateFile']}\");\nThe User::isAdmin() and adminSecurityCheck(true) guards at lines 12-15 enforce admin auth, but $_POST['updateFile'] is concatenated into a path without any sanitization. file() returns the file's contents as an array of lines; the script subsequently iterates them and echoes the SQL it would run.\n\n### PoC\nPOST /view/update.php\nContent-Type: application/x-www-form-urlencoded\n\nupdateFile=../../../../etc/passwd\nResult: the script attempts to load /etc/passwd (relative to {systemRootPath}updatedb/), echoing each line in the migration-runner HTML output. $_POST['updateFile'] traversal accepted, no extension guard, no in-array whitelist.\n\nAttempting ../../../../proc/self/environ similarly reveals web-server environment variables on Linux.\n\n\n\n### Impact\nVerified on the current master branch of WWBN/AVideo (commit bc0340662…). Likely affected: every release where view/update.php contains the $_POST['updateFile'] consumer — pattern predates 2024.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "WWBN/AVideo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "29.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WWBN/AVideo/security/advisories/GHSA-3mjv-375j-6h92"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45731"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WWBN/AVideo"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-18T19:01:59Z",
    "nvd_published_at" : "2026-05-29T14:16:31Z"
  }
}