CVE-2026-77351Low· 3.5▾ Sunlit

Wallos is an open-source, self-hostable personal subscription tracker

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score19/ 100 · Minimal

impact 19.3 · likelihood 0.1 · exploitation 0

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Proof of concept

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Published

Aug 31, 2026

Updated

Sep 8, 2026

CVSS

3.5

Vendor

—

Product

—

CWE

CWE-918

Depth score

19 · Minimal

EPSS

0.29% · p21

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS history

Exploit-prediction probability, daily snapshots since Sep 8.

0.2% → 0.3%▲ 0.1%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 25 days

Aug 31, 2026Published
Disclosed via NVD
Sep 8, 2026Record revised
Last analysed / modified upstream
Sep 8, 2026EPSS first tracked
0.2%
Sep 25, 2026EPSS peak
0.2% → 0.3%

CWE-918 #nvd

Full technical detail▾

Overview

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host — including private and cloud-metadata IP addresses — in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server's perspective. This issue has been patched in version 5.0.0.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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