CVE-2026-41883Network attack vector

Remote code execution via wildcard CDN EL evaluation

Published May 8, 2026 · Updated May 8, 2026

Expression Language injection in OmniFaces allows remote attackers to execute code in permissive EL contexts via crafted resource requests. CDNResourceHandler places a request-controlled resource name into a wildcard CDN mapping and evaluates embedded EL server-side. Exposure requires a wildcard mapping; impact depends on available EL objects, ranging from information disclosure and denial of service to remote code execution.

CVSS severity8.1
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Expression Language injection in OmniFaces allows remote attackers to execute code in permissive EL contexts via crafted resource requests. CDNResourceHandler places a request-controlled resource name into a wildcard CDN mapping and evaluates embedded EL server-side. Exposure requires a wildcard mapping; impact depends on available EL objects, ranging from information disclosure and denial of service to remote code execution.

The record

CVE
CVE-2026-41883
Published
May 8, 2026
Updated
May 8, 2026
Vendor
OmniFaces
Product
OmniFaces
Classifications
CWE-917, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.14.2
  2. Affected versionversion=>= 2.0-RC1, < 2.7.32
  3. Affected versionversion=>= 3.0-RC1, < 3.14.16
  4. Affected versionversion=>= 4.0-M1, < 4.7.5
  5. Affected versionversion=>= 5.0-M1, < 5.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OmniFaces · OmniFacesversion=< 1.14.2; version=>= 2.0-RC1, < 2.7.32; version=>= 3.0-RC1, < 3.14.16; version=>= 4.0-M1, < 4.7.5; version=>= 5.0-M1, < 5.2.3

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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