Findings

CVE-2026-102695

OmniFaces is a utility library for Faces.

Published Jul 24, 2026 · updated Oct 14, 2026

## 1. Forged combined-resource IDs accepts a path-derived ID without an authenticity check, inflates it without an output limit, converts it to attacker-selected resource identifiers, and retains unique IDs in an unbounded static cache. In bounded tests, 20,754 encoded bytes inflated to 16,000,000 characters (about 770:1; about 49 MB observed heap delta), and 200 unique IDs added 200 permanent cache entries. A legitimately shaped short ID remained about 1:1, while malformed input was rejected; the missing distinction is between a server-issued ID and an attacker-minted but structurally valid ID. The minimal application also confirmed three sink tails from the same forged-ID root: - A wildcard CDN mapping performed a server-side fetch and relayed the exact loopback-canary body. This requires the documented combined-resource and wildcard-CDN configuration. - A forged inner resource bypassed the excluded-resource boundary and returned its raw content. - A forged inner resource plus a canary header caused an outbound GET to that host. This result is blind and deployment-dependent; I am not claiming arbitrary-scheme or arbitrary-destination SSRF. These behaviors reproduce after the fix for CVE-2026-41883 / GHSA-vp6r-9m58-5xv8. That advisory concerned EL evaluation order in the wildcard CDN path. This report has a different root: unsigned combined IDs and missing decode/cache bounds, with separately demonstrated residual sink behavior. ## 2. Source-map cache With the documented optional source-map handler above a synthetic resource handler, 40 unique missing combined-resource requests grew the process-wide source-map cache from 13 to 92 entries. It has no size or eviction bound. This has a separate cache, configuration prerequisite, and fix from family 1. ## 3. HashParam callback output A URL-fragment value containing a single-quote JavaScript payload was stored by and later written unescaped into the Ajax callback script. On the follow-up Ajax render, real Chrome execute