# CVE-2026-18275: Authorization Bypass Through User-Controlled Key in eScriptorium

> Authenticated users can overwrite other users' document content by manipulating part primary keys due to improper queryset restrictions in serializers.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A: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:** 6 Aug 2026
- **Updated:** 6 Aug 2026
- **Also known as:** GHSA-4mrh-554p-w3v7

## What is CVE-2026-18275?

CVE-2026-18275 is a medium-severity missing authorization vulnerability in Scripta eScriptorium, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Authorization bypass in the process and annotation taxonomy serializers in Scripta eScriptorium through 26.04.1 allows a remote authenticated user to run segmentation and transcription against other users' document parts, overwriting their content, via part primary keys supplied to a many=True related field whose queryset restriction was applied to the ManyRelatedField instead of its child_relation and therefore had no effect

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

## Which versions are affected by CVE-2026-18275?

It affects 1 product.


Products: Escriptorium Escriptorium.

## How do I fix CVE-2026-18275?

No fix has been published for CVE-2026-18275 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18275 being exploited?

There is no known exploitation of CVE-2026-18275 in the wild and no public exploit code.

## Other vulnerabilities in Scripta eScriptorium

- [CVE-2026-18258](https://insights.sbomify.com/CVE-2026-18258/): Authorization Bypass Through User-Controlled Key in eScriptorium (high 8.8)
- [CVE-2026-18359](https://insights.sbomify.com/CVE-2026-18359/): Server-Side Request Forgery (SSRF) in eScriptorium (high 8.5)
- [CVE-2026-18277](https://insights.sbomify.com/CVE-2026-18277/): Missing Authorization in eScriptorium (high 7.1)
- [CVE-2026-18276](https://insights.sbomify.com/CVE-2026-18276/): Missing Authorization in eScriptorium (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18275 and fix it if it is affected.

What it is: CVE-2026-18275 is a medium-severity missing authorization vulnerability in Scripta eScriptorium, published on 6 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-2026-18275 in the wild and no public exploit code.

Affected product: Scripta eScriptorium. 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-2026-18275/ (Markdown: https://insights.sbomify.com/CVE-2026-18275/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18275
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18275
- OSV: https://osv.dev/vulnerability/CVE-2026-18275

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18275/
Summaries are generated and may contain mistakes; the official description above is the record.