CVE-2026-30403: There is an arbitrary file read vulnerability in the test connection function of backend database management i

Q: How do I fix CVE-2026-30403?

wgcloud: upgrade to newer than 3.6.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-30403 being exploited?

CVE-2026-30403 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-2026-30403 affect?

CVE-2026-30403 affects wgcloud. Severity is high (CVSS 7.5). There is an arbitrary file read vulnerability in the test connection function of backend database management in wgcloud v3.6.3 and before, which can be used to read any file on the victim's server.

Q: How urgent is CVE-2026-30403?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-30403 is a high-severity flaw (CVSS 7.5) affecting wgcloud. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There is an arbitrary file read vulnerability in the test connection function of backend database management in wgcloud v3.6.3 and before, which can be used to read any file on the victim's server.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-03-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wgstart

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

Am I affected?

Timeline

2026-03-19 17:16 UTCPublished CVE record published
2026-06-17 10:32 UTCUpdated Record last modified

wgstart wgcloud UPGRADE

Affected: <= 3.6.3

Fixed in: newer than 3.6.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.6.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wgcloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wgcloud

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-2026-30403?

wgcloud: upgrade to newer than 3.6.3. Exact commands for each OS are on this page.

Is CVE-2026-30403 being exploited?

CVE-2026-30403 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-2026-30403 affect?

CVE-2026-30403 affects wgcloud. Severity is high (CVSS 7.5). There is an arbitrary file read vulnerability in the test connection function of backend database management in wgcloud v3.6.3 and before, which can be used to read any file on the victim's server.

How urgent is CVE-2026-30403?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-30404 HIGH 7.5 UPGRADE The backend database management connection test feature in wgcloud v3.6.3 has a server-side request forgery (S
CVE-2026-30402 CRITICAL 9.8 UPGRADE An issue in wgcloud v.2.3.7 and before allows a remote attacker to execute arbitrary code via the test connect

References

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