# CVE-2026-73140: cti-transmute Evaluation Report Exports Expose Private Comments and Author Information

> Attackers can export evaluation reports to view private comments and author names, bypassing access controls in MISP cti-transmute.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/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:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-vrrh-vgmq-m54x

## What is CVE-2026-73140?

CVE-2026-73140 is a medium-severity missing authorization vulnerability in MISP cti-transmute, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Affected versions of cti-transmute fail to apply comment-level access-control rules when generating evaluation report exports. Although normal comment retrieval filters comments according to conversion visibility, comment privacy, ownership, authorship, and administrative privileges, build_evaluation_report() previously included all evaluation comments without applying those rules.

Consequently, a user who was authorized to view a conversion could export its evaluation report as Markdown or PDF and obtain private evaluation comments that should only have been visible to the conversion owner, the comment author, or an administrator. The leaked report data also contained the comment author's name. The fix passes the requesting user into the report builder and filters every evaluation comment using the shared access.can_see_comment() authorization function.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-73140?


## How do I fix CVE-2026-73140?

No fix has been published for CVE-2026-73140 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73140 being exploited?

There is no known exploitation of CVE-2026-73140 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73140 and fix it if it is affected.

What it is: CVE-2026-73140 is a medium-severity missing authorization vulnerability in MISP cti-transmute, published on 11 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-2026-73140 in the wild and no public exploit code.

Affected product: MISP cti-transmute. 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-2026-73140/ (Markdown: https://insights.sbomify.com/CVE-2026-73140/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73140
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73140
- OSV: https://osv.dev/vulnerability/CVE-2026-73140

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73140/
Summaries are generated and may contain mistakes; the official description above is the record.