CVE-2026-41883
HIGHCVE-2026-41883 is a high-severity (CVSS 8.1) Expression Language Injection vulnerability in org.omnifaces:omnifaces. O3 Security confirms whether CVE-2026-41883 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
OmniFaces: EL injection via crafted resource name in wildcard CDN mapping
Real-World Exposure
org.omnifaces:omnifaces☕org.omnifaces:omnifaces☕org.omnifaces:omnifaces☕org.omnifaces:omnifaces☕org.omnifaces:omnifacesReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
OmniFaces is a utility library for Faces. Prior to versions 1.14.2, 2.7.32, 3.14.16, 4.7.5, and 5.2.3, there is a server-side EL injection leading to Remote Code Execution (RCE). This affects applications that use CDNResourceHandler with a wildcard CDN mapping (e.g. libraryName:=https://cdn.example.com/). An attacker can craft a resource request URL containing an EL expression in the resource name, which is evaluated server-side. This issue has been patched in versions 1.14.2, 2.7.32, 3.14.16, 4.7.5, and 5.2.3.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.omnifaces:omnifaces | all versions | 1.14.2 |
| ☕Maven | org.omnifaces:omnifaces | ≥ 2.0-RC1&&< 2.7.32 | 2.7.32 |
| ☕Maven | org.omnifaces:omnifaces | ≥ 3.0-RC1&&< 3.14.16 | 3.14.16 |
| ☕Maven | org.omnifaces:omnifaces | ≥ 4.0-M1&&< 4.7.5 | 4.7.5 |
| ☕Maven | org.omnifaces:omnifaces | ≥ 5.0-M1&&< 5.2.3 | 5.2.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.omnifaces:omnifaces. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.omnifaces:omnifaces to 1.14.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41883 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-41883 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-41883. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-41883 in your dependencies?
O3 detects CVE-2026-41883 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.