CVE-2026-33399: Wallos is an open-source, self-hostable personal subscription tracker

Q: How do I fix CVE-2026-33399?

wallos: upgrade to 4.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33399 being exploited?

CVE-2026-33399 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-2026-33399 affect?

CVE-2026-33399 affects wallos. Severity is high (CVSS 7.7). Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-30839 and CVE-2026-30840 is incomplete. The validate_webhook_url_for_ssrf() protection was add

Q: How urgent is CVE-2026-33399?

Priority 37/100. High severity; Public exploit reference

Routine

HIGH 7.7UPGRADE

CVE-2026-33399 is a high-severity flaw (CVSS 7.7) affecting wallos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-30839 and CVE-2026-30840 is incomplete. The validate_webhook_url_for_ssrf() protection was added to the test* notification endpoints but not to the corresponding save* endpoints. An authenticated user can save an internal/private IP address as a notification URL, and when the cron job sendnotifications.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wallosapp

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

Am I affected?

Timeline

2026-03-24 18:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

wallosapp wallos UPGRADE

Affected: < 4.7.0

Fixed in: 4.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.7.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wallos

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-2026-33399?

wallos: upgrade to 4.7.0. Exact commands for each OS are on this page.

Is CVE-2026-33399 being exploited?

CVE-2026-33399 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-2026-33399 affect?

CVE-2026-33399 affects wallos. Severity is high (CVSS 7.7). Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-30839 and CVE-2026-30840 is incomplete. The validate_webhook_url_for_ssrf() protection was add

How urgent is CVE-2026-33399?

Priority 37/100. High severity; Public exploit reference

Related CVEs

CVE-2026-33417 MEDIUM 6.5 UPGRADE Wallos is an open-source, self-hostable personal subscription tracker
CVE-2026-33407 CRITICAL 9.1 UPGRADE Wallos is an open-source, self-hostable personal subscription tracker
CVE-2026-33401 MEDIUM 6.5 UPGRADE Wallos is an open-source, self-hostable personal subscription tracker
CVE-2026-33400 MEDIUM 5.4 UPGRADE Wallos is an open-source, self-hostable personal subscription tracker
CVE-2026-30842 MEDIUM 4.3 UPGRADE Wallos is an open-source, self-hostable personal subscription tracker

References

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