GHSA-8vp7-8q4w-vv7m: Duplicate Advisory Grav: UserInterface Offsetget/offsetexists Allow-listed Vulnerability

HIGH
Share
CVSS 6.5
CWE-522
Published
Advisory Summary

GHSA-8vp7-8q4w-vv7m is a HIGH (CVSS 6.5) grav: userinterface offsetget/offsetexists allow-listed vulnerability (CWE-522: Insufficiently Protected Credentials) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves grav: userinterface offsetget/offsetexists allow-listed in twig sandbox let editor-authored content leak hashed_password and 2fa secrets via offsetget(). Remediation is available in the latest vendor maintenance releases.

GHSA-8vp7-8q4w-vv7m at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-8vp7-8q4w-vv7m
Severity HIGH
CVSS v3.1 Base Score 6.5
CWE Classification CWE-522: Insufficiently Protected Credentials
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:N/A:N).

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

How to Fix GHSA-8vp7-8q4w-vv7m

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

getgrav/grav fixed: Latest secure release 
Upgrade getgrav/grav 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 getgrav/grav

How to Check if You Are Affected

To determine whether your application is affected by GHSA-8vp7-8q4w-vv7m, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for getgrav/grav

Analyze the terminal output to locate any version of Duplicate Advisory 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-522: Insufficiently Protected Credentials, where the product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. In Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-3jhr-mxmx-38cx. This link is maintained to preserve external references. ### Original Description Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.

GHSA-8vp7-8q4w-vv7m Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
getgrav/grav
 Packagist

References

GitHub Advisory / Wiki ADVISORY
https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx
NVD — GHSA-8vp7-8q4w-vv7m NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76839
www.vulncheck.com/advisories/grav-bef... WEB
https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget

Frequently Asked Questions

What is GHSA-8vp7-8q4w-vv7m?
GHSA-8vp7-8q4w-vv7m is a security vulnerability in Duplicate Advisory involving Grav: UserInterface offsetget/offsetexists allow-listed in Twig sandbox let editor-authored content leak hashed_password and 2FA secrets via offsetGet() under CWE-522: Insufficiently Protected Credentials.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: getgrav/grav.
What version fixes GHSA-8vp7-8q4w-vv7m?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is getgrav/grav affected?
Yes, getgrav/grav is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-8vp7-8q4w-vv7m?
GHSA-8vp7-8q4w-vv7m has a CVSS v3.1 base score of 6.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with GHSA-8vp7-8q4w-vv7m?
GHSA-8vp7-8q4w-vv7m is classified under CWE-522: Insufficiently Protected Credentials (The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.).
How can I check Packagist dependencies for GHSA-8vp7-8q4w-vv7m?
Run the dependency tree command: 'inspect dependencies for getgrav/grav'. 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-8vp7-8q4w-vv7m",
  "modified" : "2026-09-17T20:27:12Z",
  "published" : "2026-08-25T03:32:10Z",
  "withdrawn" : "2026-09-17T20:27:12Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Grav: UserInterface offsetget/offsetexists allow-listed in Twig sandbox let editor-authored content leak hashed_password and 2FA secrets via offsetGet()",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-3jhr-mxmx-38cx. This link is maintained to preserve external references.\n\n### Original Description\nGrav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "getgrav/grav"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 2.0.16"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-76839"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-522" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-17T20:27:12Z",
    "nvd_published_at" : "2026-08-25T02:16:51Z"
  }
}