# CVE-2026-18276: Scripta eScriptorium missing authorization in websocket consumer

Source: https://junglewise.ai/threats/cve-2026-18276-scripta-escriptorium-missing-authorization-in-websocket-consumer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-06. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18276 · Severity: medium · CVSS 4.3 · Published 2026-08-06

eScriptorium is a document transcription and analysis platform. A missing access control check in the websocket event system allows authenticated users to subscribe to any document's activity stream without permission, exposing other users' transcription work, training activities, and file operations to unauthorized observation.

Technologies: [Escriptorium](https://junglewise.ai/threats/technologies/escriptorium). Vendors: [Escriptorium](https://junglewise.ai/threats/vendors/escriptorium).

## Quick answers

**Is CVE-2026-18276 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18276 being exploited in the wild.

**How severe is CVE-2026-18276?** Medium severity, with a CVSS score of 4.3, published 6 August 2026.

**Which products and versions are affected?** Scripta eScriptorium through 26.04.1.

**Is there a fix for CVE-2026-18276?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-18276 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-18276?** Check whether you run Escriptorium. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an authorization bypass in the websocket consumer component. The vulnerable code accepts object_cls and object_pk parameters from a join-room message and adds the client to the corresponding event stream group via group_add without verifying the user has access to that document. An authenticated attacker can craft a websocket message with object identifiers of any document to subscribe to real-time event streams, observing segmentation, transcription, import, export, and training activities performed by legitimate users. The attack requires prior authentication but no other preconditions; the websocket endpoint is network-reachable.

## Affected products

- Scripta eScriptorium through 26.04.1

## Timeline

- 2026-08-06: disclosed

## References

- [https://gitlab.com/scripta/escriptorium/-/work_items/1229](https://gitlab.com/scripta/escriptorium/-/work_items/1229)

## Related threats

- [Scripta eScriptorium server-side request forgery in document import](https://junglewise.ai/threats/cve-2026-18359-scripta-escriptorium-server-side-request-forgery-in-document)
- [Scripta eScriptorium missing authorization in OCR model access control](https://junglewise.ai/threats/cve-2026-18277-scripta-escriptorium-missing-authorization-in-ocr-model-access)
- [Scripta eScriptorium authorization bypass in taxonomy serializers](https://junglewise.ai/threats/cve-2026-18275-scripta-escriptorium-authorization-bypass-in-taxonomy-serializers)
- [Scripta eScriptorium authorization bypass in API endpoints](https://junglewise.ai/threats/cve-2026-18258-scripta-escriptorium-authorization-bypass-in-api-endpoints)