# CVE-2026-11944: openSIS Classic 9.3 - Authenticated path traversal in SentMail attachment download

> Authenticated attackers can read arbitrary server files via path traversal in openSIS Classic's sent-mail attachment download feature.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-5v7m-6h74-672r

## What is CVE-2026-11944?

CVE-2026-11944 is a medium-severity path traversal vulnerability in Os4ed Opensis, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-11944?

It affects 1 product.


Products: Os4ed Opensis.

## How do I fix CVE-2026-11944?

No fix has been published for CVE-2026-11944 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11944 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11944 exists.

## Other vulnerabilities in Os4ed Opensis

- [CVE-2020-6143](https://insights.sbomify.com/CVE-2020-6143/): Code injection in OS4Ed (critical 10.0)
- [CVE-2020-6144](https://insights.sbomify.com/CVE-2020-6144/): Code injection in OS4Ed (critical 10.0)
- [CVE-2020-6142](https://insights.sbomify.com/CVE-2020-6142/): Path traversal in OS4Ed (critical 9.9)
- [CVE-2021-41691](https://insights.sbomify.com/CVE-2021-41691/): SQL injection in n/a (critical 9.8)
- [CVE-2025-22926](https://insights.sbomify.com/CVE-2025-22926/): Path traversal in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11944 and fix it if it is affected.

What it is: CVE-2026-11944 is a medium-severity path traversal vulnerability in Os4ed Opensis, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11944 exists.

Affected product: Os4ed Opensis. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11944/ (Markdown: https://insights.sbomify.com/CVE-2026-11944/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11944
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11944
- OSV: https://osv.dev/vulnerability/CVE-2026-11944

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11944/
Summaries are generated and may contain mistakes; the official description above is the record.