# CVE-2026-18744: CVE-2026-18744

> Authenticated users can access other vendors' confidential case statements and status by manipulating member IDs, bypassing tenant isolation controls.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** 12 Aug 2026
- **Updated:** 13 Aug 2026
- **Also known as:** GHSA-8pgg-45wg-rcx3

## What is CVE-2026-18744?

CVE-2026-18744 is a medium-severity missing authorization vulnerability in CERT/CC VINCE, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Any authenticated case participant can fetch any OTHER vendor's CaseStatement + per-vul CaseMemberStatus by supplying that member's id — test_func only checks _is_my_case, not ownership of kwargs['member']. Bypasses share_status; leaks embargoed vendor affected/not-affected + statement text cross-tenant.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-18744?


## How do I fix CVE-2026-18744?

No fix has been published for CVE-2026-18744 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18744 being exploited?

There is no known exploitation of CVE-2026-18744 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18744 and fix it if it is affected.

What it is: CVE-2026-18744 is a medium-severity missing authorization vulnerability in CERT/CC VINCE, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18744 in the wild and no public exploit code.

Affected product: CERT/CC VINCE. 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-2026-18744/ (Markdown: https://insights.sbomify.com/CVE-2026-18744/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18744
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18744
- OSV: https://osv.dev/vulnerability/CVE-2026-18744

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18744/
Summaries are generated and may contain mistakes; the official description above is the record.