CVE WatchSep 1, 2026

CVE-2026-50198

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.1, an authenticated user can edit their own inac

CVSS

4.3

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 31, 2026 · Last modified: Sep 1, 2026 · CWE-639

EPSS · 30d

Not enough EPSS history yet.

Technical description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.1, an authenticated user can edit their own inactive subscription and set replacement_subscription_id to a subscription ID belonging to another user. The write is accepted, and later the stats logic dereferences that foreign subscription ID without user_id scoping. This lets the attacker infer the victim subscription's monthly-normalized cost by observing changes in their own stats output. This does not expose the full victim subscription object, but it does expose derived financial metadata. This issue has been patched in version 4.9.1.

Official references

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