PatchTheCVECVE-2020-26176: An issue was discovered in tangro Business Workflow before 1.18.1
CVE-2020-26176 is a medium-severity flaw (CVSS 4.3) affecting business workflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 45%) |
| CISA exploited list | No |
| Weakness | CWE-922 |
| Published | 2020-12-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-26176?
business workflow: upgrade to 1.18.1. Exact commands for each OS are on this page.
Is CVE-2020-26176 being exploited?
CVE-2020-26176 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-26176 affect?
CVE-2020-26176 affects business workflow. Severity is medium (CVSS 4.3). 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 w
How urgent is CVE-2020-26176?
Priority 34/100. Public exploit reference
Related CVEs
- CVE-2024-34689 MEDIUM 5.0 MITIGATE DOWNGRADE WebFlow Services of SAP Business Workflow allows an authenticated attacker to enumerate accessible HTTP endpoi
- CVE-2020-26178 MEDIUM 5.3 UPGRADE In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attac
- CVE-2020-26177 MEDIUM 4.3 UPGRADE In tangro Business Workflow before 1.18.1, a user's profile contains some items that are greyed out and thus a
- CVE-2020-26175 MEDIUM 6.5 UPGRADE In tangro Business Workflow before 1.18.1, an attacker can manipulate the value of PERSON in requests to /api/
- CVE-2020-26174 HIGH 8.8 UPGRADE tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uplo