CVE-2020-26174
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and...
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.
- Record
CVE-2020-26174- CVSS 3.1
- 8.8 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2020-18799
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.
- Record
EUVD-2020-18799- CVSS 3.1
- 8.8 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-g862-hhr5-33gv No score
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and...
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.
- Record
GHSA-g862-hhr5-33gv- Weakness
- CWE-434
- Updated
- 2026-11-02
NVD
tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.
- Record
CVE-2020-26174- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-26174 is a high vulnerability (CVSS 8.8) in Tangro Business Workflow, published December 18, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.