What’s Vulnerable › Vulnerabilities

CVE-2026-41689: Wallos: Shared local webhook allowlist lets low-privilege users send arbitrary requests to allowlisted internal services

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-07 · updated 2026-10-26
• Weakness: CWE-863

Description

Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the webhook notification feature reuses an administrator-configured local-target allowlist for every logged-in user. Any normal user can fully control a webhook URL, headers, and body, then use Wallos to send server-side requests to allowlisted internal automation services. When such a target exposes deployment or execution APIs, this can further enable adjacent-service RCE, but that downstream result is conditional on the target service. At time of publication, there are no publicly available patches.

Affected products

• ellite Wallos: through 4.8.4

References

• https://github.com/ellite/Wallos/security/advisories/GHSA-jx6w-832g-42wv
• https://github.com/ellite/Wallos/security/advisories/GHSA-jx6w-832g-42wv

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