Vulnerability · Published Aug 31, 2026 · Assigned by GitHub_M

CVE-2026-77352Wallos: Authenticated SSRF via per-user SMTP notification host (low-privilege user)

Medium 4.3

In plain English

A medium-severity server-side request forgery in Wallos from ellite. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 73.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail->Host = $email['smtpAddress']). When the user's subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0.

Affected products (as reported)

Vendor	Product	Versions
ellite	Wallos	>= 2.0.0, < 5.0.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj x_refsource_CONFIRM
https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3 x_refsource_MISC
https://github.com/ellite/Wallos/releases/tag/v5.0.0 x_refsource_MISC