CVE-2026-111636: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-m82j-2j7c-gx6q
Share
CVSS 8.1
CWE-321
Published
Advisory Summary

CVE-2026-111636 is a CRITICAL (CVSS 8.1) security vulnerability vulnerability (CWE-321: Use of Hard-coded Cryptographic Key) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses a hard-coded, unchangeable cryptographic key.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-111636 at a Glance

CVE Identifier CVE-2026-111636
GHSA Identifier GHSA-m82j-2j7c-gx6q
Severity CRITICAL
CVSS v3.1 Base Score 8.1
CWE Classification CWE-321: Use of Hard-coded Cryptographic Key
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.1

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

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

How to Fix CVE-2026-111636

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.

Verify Direct and Transitive Dependencies

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

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-111636, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze 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-321: Use of Hard-coded Cryptographic Key, where the product uses a hard-coded, unchangeable cryptographic key. 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

OpenBMB StaffDeck through 0.5.6 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge administrator session tokens using the hard-coded default app_secret. Attackers can sign an HMAC-SHA256 token for the seeded 'admin' user in 'tenant_demo' to gain full tenant administration, including stored model and channel credentials.

References

NVD — CVE-2026-111636 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111636
Software Source Repository REPOSITORY
https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10
Software Source Repository REPOSITORY
https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98
hackmd.io/@hieupenguinnn/staf... WEB
https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass
www.vulncheck.com/advisories/openbmb-... WEB
https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret

Frequently Asked Questions

What is CVE-2026-111636?
CVE-2026-111636 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-321: Use of Hard-coded Cryptographic Key.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-111636?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-111636?
CVE-2026-111636 has a CVSS v3.1 base score of 8.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-111636?
CVE-2026-111636 is classified under CWE-321: Use of Hard-coded Cryptographic Key (The product uses a hard-coded, unchangeable cryptographic key.).
How can I check Maven dependencies for CVE-2026-111636?
Run the dependency tree command: 'mvn dependency:tree'. 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-m82j-2j7c-gx6q",
  "modified" : "2026-10-16T18:34:46Z",
  "published" : "2026-10-16T18:34:45Z",
  "aliases" : [ "CVE-2026-111636" ],
  "details" : "OpenBMB StaffDeck through 0.5.6 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge administrator session tokens using the hard-coded default app_secret. Attackers can sign an HMAC-SHA256 token for the seeded 'admin' user in 'tenant_demo' to gain full tenant administration, including stored model and channel credentials.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-111636"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/config.py#L10"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OpenBMB/StaffDeck/blob/v0.5.6/backend/app/security/auth.py#L96-L98"
  }, {
    "type" : "WEB",
    "url" : "https://hackmd.io/@hieuPenguinnn/staffdeck-default-token-signing-secret-auth-bypass"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openbmb-staffdeck-through-0.5.6-authentication-bypass-via-hard-coded-session-secret"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-321" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-16T18:17:44Z"
  }
}