CVE-2026-54600: Wallos: Unauthenticated database replacement via import endpoint on fresh install

Severity: high (CVSS 8.2 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-31 · updated 2026-09-08
Weakness: CWE-287

Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, endpoints/db/import.php has no authentication. The only guard is a user-table row count — if zero (fresh/unconfigured install), an unauthenticated attacker can replace the entire database. This issue has been patched in version 4.9.4.

Affected products

ellite Wallos: before 4.9.4

References

https://github.com/ellite/Wallos/releases/tag/v4.9.4
https://github.com/ellite/Wallos/security/advisories/GHSA-8wqc-r9j3-rv7m
https://github.com/ellite/Wallos/security/advisories/GHSA-8wqc-r9j3-rv7m

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