CVE-2026-77351: CWE-918: Server-Side Request Forgery (SSRF) in ellite Wallos
Description
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.
CVSS v3.1
Score 3.5low
Affected software
ellite
Wallos
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Wallos versions before 5.0.0 allow authenticated users to store arbitrary SMTP host addresses in their email notification settings without validation. When the notification cron job runs, it uses PHPMailer to connect to the stored SMTP host, enabling SSRF. This can be exploited to probe internal network services from the server's perspective. The issue is fixed in Wallos 5.0.0.
Potential Impact
An attacker with low privileges can cause the Wallos server to initiate outbound TCP connections to arbitrary addresses, including internal network or cloud metadata IPs. This enables network reconnaissance from the server's perspective but does not directly impact confidentiality, integrity, or availability of Wallos itself. The CVSS score of 3.5 reflects limited impact.
Mitigation Recommendations
Upgrade Wallos to version 5.0.0 or later, where this SSRF vulnerability has been patched. No other mitigation or temporary fix is indicated. Patch status is confirmed by the vendor advisory stating the issue is fixed in version 5.0.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-20T19:28:35.244Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a95f0a7acd9273b499ab2f0
Added to database: 08/31/2026, 21:22:47 UTC
Last enriched: 09/07/2026, 15:01:49 UTC
Last updated: 10/15/2026, 18:48:23 UTC
Views: 98
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.