CVE-2020-26178: In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attac

Q: How do I fix CVE-2020-26178?

business workflow: upgrade to 1.18.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-26178 being exploited?

CVE-2020-26178 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-26178 affect?

CVE-2020-26178 affects business workflow. Severity is medium (CVSS 5.3). In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attachments without being authenticated.

Q: How urgent is CVE-2020-26178?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2020-26178 is a medium-severity flaw (CVSS 5.3) affecting business workflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attachments without being authenticated.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-639
Published	2020-12-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tangro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-18 10:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

tangro business workflow UPGRADE

Affected: < 1.18.1

Fixed in: 1.18.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy business-workflow || rpm -q business-workflow || business-workflow --version

2. UPGRADE to 1.18.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade business-workflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade business-workflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2020-26178?

business workflow: upgrade to 1.18.1. Exact commands for each OS are on this page.

Is CVE-2020-26178 being exploited?

CVE-2020-26178 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-2020-26178 affect?

CVE-2020-26178 affects business workflow. Severity is medium (CVSS 5.3). In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attachments without being authenticated.

How urgent is CVE-2020-26178?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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