CVE-2026-77767: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5r22-jfv5-3cpg
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CVSS 7.5
CWE-862
Published
Advisory Summary

CVE-2026-77767 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-862: Missing Authorization) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not perform an authorization check when an actor attempts to access a resource or perform an action.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-77767 at a Glance

CVE Identifier CVE-2026-77767
GHSA Identifier GHSA-5r22-jfv5-3cpg
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-862: Missing Authorization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-77767

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-2026-77767, 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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

Reconmap's API applies a fallback authorization policy in apps/api/app/Program.cs that requires an authenticated user holding the administrator role, so controllers without their own attribute reject anonymous callers. The report preview action in apps/api/app/Controllers/ReportsController.cs carries [AllowAnonymous] and therefore opts out of that policy. PreviewReport loads the Project row named by the id path segment, loads the linked Organisation through the project's ClientId, and renders both into default-report-template.html, which prints the project name and description together with the client organisation's name, address and URL. No authentication, project membership or role check is performed. Because the id is the auto-increment primary key of the project table, an unauthenticated remote caller can walk sequential ids to retrieve the engagement details and client organisation of every project on the instance, and the 404 returned for a missing id reveals which project ids exist. Reconmap stores penetration-testing engagements, so the disclosed descriptions and client records are sensitive by nature.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/reconmap/reconmap/security/advisories/GHSA-mhrh-jfmr-8mmw
NVD — CVE-2026-77767 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77767
Security Fix Commit FIX COMMIT
https://github.com/reconmap/reconmap/commit/2b2eb0cf0aa95726b4edd0045f86d2dcdb8de34d
Software Source Repository REPOSITORY
https://github.com/reconmap/reconmap
Software Source Repository REPOSITORY
https://github.com/reconmap/reconmap/blob/56ca3748343a50c98185d53827172d8f13a6ad0f/apps/api/app/Controllers/ReportsController.cs
Software Source Repository REPOSITORY
https://github.com/reconmap/reconmap/blob/56ca3748343a50c98185d53827172d8f13a6ad0f/apps/api/app/Program.cs
www.vulncheck.com/advisories/reconmap... WEB
https://www.vulncheck.com/advisories/reconmap-report-preview-endpoint-is-marked-allowanonymous-exposing-every-project-and-client-organisation-without-authentication

Frequently Asked Questions

What is CVE-2026-77767?
CVE-2026-77767 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-862: Missing Authorization.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-77767?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-77767?
CVE-2026-77767 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-77767?
CVE-2026-77767 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-77767?
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-5r22-jfv5-3cpg",
  "modified" : "2026-08-21T12:30:33Z",
  "published" : "2026-08-21T12:30:33Z",
  "aliases" : [ "CVE-2026-77767" ],
  "details" : "Reconmap's API applies a fallback authorization policy in apps/api/app/Program.cs that requires an authenticated user holding the administrator role, so controllers without their own attribute reject anonymous callers. The report preview action in apps/api/app/Controllers/ReportsController.cs carries [AllowAnonymous] and therefore opts out of that policy. PreviewReport loads the Project row named by the id path segment, loads the linked Organisation through the project's ClientId, and renders both into default-report-template.html, which prints the project name and description together with the client organisation's name, address and URL. No authentication, project membership or role check is performed. Because the id is the auto-increment primary key of the project table, an unauthenticated remote caller can walk sequential ids to retrieve the engagement details and client organisation of every project on the instance, and the 404 returned for a missing id reveals which project ids exist. Reconmap stores penetration-testing engagements, so the disclosed descriptions and client records are sensitive by nature.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/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" : [ ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/reconmap/reconmap/security/advisories/GHSA-mhrh-jfmr-8mmw"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-77767"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reconmap/reconmap/commit/2b2eb0cf0aa95726b4edd0045f86d2dcdb8de34d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reconmap/reconmap"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reconmap/reconmap/blob/56ca3748343a50c98185d53827172d8f13a6ad0f/apps/api/app/Controllers/ReportsController.cs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reconmap/reconmap/blob/56ca3748343a50c98185d53827172d8f13a6ad0f/apps/api/app/Program.cs"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/reconmap-report-preview-endpoint-is-marked-allowanonymous-exposing-every-project-and-client-organisation-without-authentication"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-21T11:17:07Z"
  }
}