CVE-2026-111687: Rachelos We-Mp-Rss

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.

Affected products

• Rachelos We-Mp-Rss: up to and including 1.5.3

Published 2026-10-16. Last modified 2026-10-16.