CVE-2026-40230: Helpy contains a stored cross-site scripting vulnerability in the knowledge base Doc rendering logic

Routine

MEDIUM 5.4DOWNGRADE

CVE-2026-40230 is a medium-severity flaw (CVSS 5.4) affecting helpy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Helpy contains a stored cross-site scripting vulnerability in the knowledge base Doc rendering logic. An authenticated attacker with admin or agent editor privileges can persist arbitrary HTML or JavaScript in the body field of a knowledge base Doc.This issue affects helpy: 2.8.0.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-29
Last modified	2026-10-26

Publisher (CNA): Fluid Attacks · Vendor: helpy.io

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-29 16:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

helpy.io helpy DOWNGRADE

Affected: 2.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.8.0

1. Check installed version

apt-cache policy helpy || rpm -q helpy || helpy --version

2. No fixed release: DOWNGRADE to a release before 2.8.0 (Debian / Ubuntu)

apt-cache madison helpy sudo apt install helpy=<VERSION_BEFORE_2.8.0> sudo apt-mark hold helpy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list helpy sudo dnf downgrade helpy-<VERSION_BEFORE_2.8.0> sudo dnf versionlock add helpy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-40230?

helpy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-40230 being exploited?

CVE-2026-40230 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-2026-40230 affect?

CVE-2026-40230 affects helpy. Severity is medium (CVSS 5.4). Helpy contains a stored cross-site scripting vulnerability in the knowledge base Doc rendering logic. An authenticated attacker with admin or agent editor privileges can persist arbitrary HTML or JavaScript in the body field of a knowledge

How urgent is CVE-2026-40230?

Priority 26/100. Public exploit reference

Related CVEs

CVE-2026-40229 MEDIUM 5.4 DOWNGRADE Helpy contains a stored cross-site scripting vulnerability in the post author display logic

References

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