dbcve.org
OpensisApplication · Os4ed

CVE-2026-11944

MEDIUM · 6.5 CVSS v3.1 Published 2026-07-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
71/100
Remediation priority · Elevated
Public exploit Remotely reachable Zero-click 5 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
openSIS Classic 9.3 contains an authenticated path traversal vulnerability in the legacy messaging sent-mail attachment download functionality that allows an authenticated attacker to read arbitrary files on the server via crafted path traversal sequences.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

openSIS Classic 9.3 has an authenticated path traversal vulnerability in the legacy messaging sent-mail attachment download function. An authenticated attacker can use crafted path traversal sequences (such as ../../) in the attachment download parameter to access and read arbitrary files on the server filesystem outside the intended directory.

MitigationImplement strict input validation on the file path parameter to reject path traversal sequences, and use canonical path resolution to ensure the requested file stays within the intended directory bounds.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
OpensisApplication
Affected:= 9.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm openSIS version
    Locate the version file or check the admin dashboard for the installed openSIS version. Common locations include a version.php file in the root directory or the system administration panel.
    Affected if The installed version is exactly 9.3 (openSIS Classic)
  2. Identify legacy messaging module presence
    Check if the legacy messaging system is accessible in the application. Look for menu items or endpoints related to 'sent-mail' or messaging in the /modules/ directory.
    Affected if The legacy messaging module is installed and accessible to authenticated users
  3. Locate attachment download functionality
    Search for the file handling code in the messaging module, specifically the sent-mail attachment download handler. Look for code that processes file download requests.
    Affected if The attachment download function exists and processes file path parameters
  4. Verify path parameter handling
    Examine the attachment download code to see if it uses user-supplied input directly in file operations without sanitization. Check if the parameter accepts and processes path traversal sequences.
    Affected if The code accepts user input for file paths without validating or rejecting ../ sequences
  5. Check authentication requirements
    Confirm the attack requires an authenticated session. Verify if the vulnerable endpoint is protected by login authentication.
    Affected if The vulnerability is accessible to authenticated users (any valid user credentials)
  6. Review file access boundaries
    Inspect whether the application uses canonical path resolution or directory containment checks before serving files.
    Affected if The application does not enforce directory boundaries or validate resolved paths

A user is affected if they are running openSIS Classic version 9.3 with the legacy messaging module enabled and the attachment download function accepts unsanitized path parameters that allow traversal outside the intended directory.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict input validation on the file path parameter to reject path traversal sequences, and use canonical path resolution to ensure the requested file stays within the intended directory bounds.

Fix this in Opensis Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,280
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,648.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-11944 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-11944 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data