Is CVE-2026-50198 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-50198 being exploited in the wild.

How severe is CVE-2026-50198?

Medium severity, with a CVSS score of 4.3, published 31 August 2026.

Is there a fix for CVE-2026-50198?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-50198 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-50198?

Check whether you run Ellite Wallos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-50198: Wallos cross-user subscription cost inference via replacement_subscription_id

CVE-2026-50198 · Severity: medium · CVSS 4.3 · Published 2026-08-31

Wallos is an open-source personal subscription tracker that helps users manage and monitor their recurring payments. An authenticated attacker can manipulate their own subscription settings to reference another user's subscription and then infer that victim's subscription cost through the application's statistics output, exposing sensitive financial metadata without direct access to the victim's data.

Technologies: Ellite Wallos. Vendors: Ellite.

Quick answers

Is CVE-2026-50198 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-50198 being exploited in the wild.
How severe is CVE-2026-50198?: Medium severity, with a CVSS score of 4.3, published 31 August 2026.
Which products and versions are affected?: Ellite Wallos prior to 4.9.1.
Is there a fix for CVE-2026-50198?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-50198 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-50198?: Check whether you run Ellite Wallos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a cross-user data isolation flaw in the subscription editing endpoint (POST /endpoints/subscription/add.php). An authenticated user can set the replacement_subscription_id field to reference any subscription ID, including those belonging to other users. The vulnerable code does not validate that the referenced subscription belongs to the requesting user. Later, when the stats calculation logic (includes/stats_calculations.php) performs a lookup to compute monthly-normalized costs, it queries the subscriptions table without scoping by user_id, allowing the attacker to infer the victim's subscription cost by observing deltas in their own stats output. Attack requires authentication and an inactive subscription to edit; no user interaction or social engineering is needed. The vulnerability was patched in version 4.9.1 by adding proper user_id scoping validation.

Affected products

ellite Wallos prior to 4.9.1

Timeline

2026-05-27: disclosed: Version 4.9.1 released with patch
2026-06-01: advisory: GitHub Security Advisory GHSA-hggr-v8rm-c6jj published
2026-08-31: other: CVE-2026-50198 published

References

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