CVE-2020-26172: Every login in tangro Business Workflow before 1.18.1 generates the same JWT token, which allows an attacker t

Q: How do I fix CVE-2020-26172?

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

Q: Is CVE-2020-26172 being exploited?

CVE-2020-26172 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-2020-26172 affect?

CVE-2020-26172 affects business workflow. Severity is medium (CVSS 4.2). Every login in tangro Business Workflow before 1.18.1 generates the same JWT token, which allows an attacker to reuse the token when a session is active. The JWT token does not contain an expiration timestamp.

Q: How urgent is CVE-2020-26172?

Priority 33/100. Public exploit reference

Routine

MEDIUM 4.2UPGRADE

CVE-2020-26172 is a medium-severity flaw (CVSS 4.2) affecting business workflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Every login in tangro Business Workflow before 1.18.1 generates the same JWT token, which allows an attacker to reuse the token when a session is active. The JWT token does not contain an expiration timestamp.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-294
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-2020-26172?

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

Is CVE-2020-26172 being exploited?

CVE-2020-26172 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-2020-26172 affect?

CVE-2020-26172 affects business workflow. Severity is medium (CVSS 4.2). Every login in tangro Business Workflow before 1.18.1 generates the same JWT token, which allows an attacker to reuse the token when a session is active. The JWT token does not contain an expiration timestamp.

How urgent is CVE-2020-26172?

Priority 33/100. Public exploit reference

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References

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