CVE-2026-78175: Software Security Vulnerability Vulnerability
HIGHCVE-2026-78175 is a HIGH (CVSS 8.8) security vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-78175 at a Glance
Security Impact
CVSS: 8.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-78175
To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-78175, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze the terminal output to locate any version of Software 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: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Software, 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
References
Frequently Asked Questions
What is CVE-2026-78175?
Which Software versions are affected?
What version fixes CVE-2026-78175?
What is the CVSS score of CVE-2026-78175?
What CWE is associated with CVE-2026-78175?
How can I check Maven dependencies for CVE-2026-78175?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-cg5c-mg8j-jqc2",
"modified" : "2026-09-12T09:33:35Z",
"published" : "2026-09-12T09:33:35Z",
"aliases" : [ "CVE-2026-78175" ],
"details" : "The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the `withdraw_method_field` parameter of the `tutor_save_withdraw_account` AJAX handler. This is due to the handler lacking any capability or role check, relying solely on a nonce, while also passing attacker-supplied values through `esc_sql()`, which replaces every `%` character with a 66-byte HMAC placeholder token before the data is serialized and stored via `update_user_meta()`; when the meta is later retrieved, the placeholder is collapsed back to a single `%`, leaving serialized string length declarations 65 bytes greater than the actual content, and because array keys originate from entirely unescaped POST field names, `unserialize()` over-reads into attacker-controlled bytes, allowing injection of an arbitrary serialized object stream. This makes it possible for authenticated attackers, with subscriber-level access and above, to achieve remote code execution on the server by triggering the `GuzzleHttp\\Cookie\\FileCookieJar` POP chain, reachable via the `spl_autoload_register` loader in `TUTOR\\RestAPI` which loads the plugin's own bundled PayPal Composer autoloader, writing attacker-controlled content to an attacker-specified filename. This has an unauthenticated pathway when user registration is enabled, which is common for students and teachers to register, and it requires the monetization feature to be enabled.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-78175"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/RestAPI.php#L190"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L204"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L213"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L217"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/browser/tutor/tags/4.0.7/classes/Withdraw.php#L44"
}, {
"type" : "WEB",
"url" : "https://plugins.trac.wordpress.org/changeset?reponame=&old=3690454%40tutor&new=3690454%40tutor"
}, {
"type" : "WEB",
"url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/d0077d56-11e7-4e74-abe0-63e81db67be3?source=cve"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-502" ],
"severity" : "HIGH",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-09-12T08:16:24Z"
}
}