CVE-2026-77767: reconmap reconmap advisory

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

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.

Description quoted from the CVE record (assigned by VulnCheck, published 2026-08-21).

Weakness: Missing Authorization

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing no privileges and no user interaction. Impact: confidentiality high, integrity none, availability none. 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

CISA assessment (SSVC): CISA assesses that a public proof of concept exists. Automatable: yes. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-63900, GHSA-5r22-jfv5-3cpg

VEDAS cluster: VEDAS:DEEPDARING

Exploit Observer links 5 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (5)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (3)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2026-63900
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-5r22-jfv5-3cpg
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-77767

2 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.005
low predicted chance of attack
VEDAS: 0.988
strong exploit evidence
On CISA KEV: Not listed
Detection rule: Nuclei · Suricata

Who is affected

Product	Affected	Not affected
reconmap reconmap	up to and including 3.2.2	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

Vendor guidance:

GHSA-mhrh-jfmr-8mmw (vendor-advisory)
AllowAnonymous removed from the preview action (patch)

How to detect it

Nuclei template (active check)

Reconmap - Unauthenticated Report Preview Broken Access Control
Reconmap’s API applies a fallback authorization policy requiring an authenticated administrator, but the report preview action PreviewReport in apps/api/src/Controllers/ReportsController.cs is decorated with [AllowAnonymous] and performs no authentication, project membership or role check. The action is routed at GET /api/reports/{id}/preview (controller route “api/[controller]”) and loads the Project row named by the auto-increment id, loads the linked client Organisation and renders both into default-report-template.html, disclosing the engagement name/description and client organisation name, address and URL. An unauthenticated remote caller can walk sequential ids to retrieve every project’s engagement details. This template requests the preview for project id 1 and confirms the vulnerability by matching the rendered penetration test report template; patched builds removed the preview action and return 404.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /api/reports/1/preview); it decides using status, word matchers. Severity in the template: high. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2026-77767.yaml

Show the template (43 lines)

yaml

id: CVE-2026-77767

info:
  name: "Reconmap - Unauthenticated Report Preview Broken Access Control"
  author: vedas-arpsyndicate
  severity: high
  description: |
    Reconmap's API applies a fallback authorization policy requiring an authenticated
    administrator, but the report preview action PreviewReport in
    apps/api/src/Controllers/ReportsController.cs is decorated with [AllowAnonymous] and
    performs no authentication, project membership or role check. The action is routed at
    GET /api/reports/{id}/preview (controller route "api/[controller]") and loads the Project
    row named by the auto-increment id, loads the linked client Organisation and renders both
    into default-report-template.html, disclosing the engagement name/description and client
    organisation name, address and URL. An unauthenticated remote caller can walk sequential
    ids to retrieve every project's engagement details. This template requests the preview for
    project id 1 and confirms the vulnerability by matching the rendered penetration test
    report template; patched builds removed the preview action and return 404.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-77767&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=reconmap&match=exact
  classification:
    cvss-metrics: 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
    cvss-score: 8.7
    cve-id: CVE-2026-77767
    cwe-id: CWE-862
  metadata:
    verified: false
  tags: cve,cve2026,reconmap,auth-bypass,exposure,unauth

http:
  - method: GET
    path:
      - "{{BaseURL}}/api/reports/1/preview"
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "Penetration Test Report"
      - type: status
        status:
          - 200

CVE-2026-77767.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-77767 Reconmap Unauthenticated Report Preview Access Control Bypass. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"VEDAS CVE-2026-77767 Reconmap Unauthenticated Report Preview Access Control Bypass"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/reports/"; content:"/preview"; distance:0; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-77767; reference:url,https://www.exploit.observer/?keyword=CVE-2026-77767&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=reconmap&match=exact; sid:1096800; rev:1;)

CVE-2026-77767.rules on GitHub

References

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.