CVE-2025-27636Public exploitNetwork attack vector

Unauthorized method invocation via case-variant headers

Published Mar 9, 2025 · Updated Feb 26, 2026

Header injection in affected Apache Camel releases allows remote attackers to invoke unintended bean methods through crafted HTTP headers. DefaultHeaderFilterStrategy compares only exact Camel, camel, and org.apache.camel. prefixes, allowing mixed-case internal header names to enter the exchange. Reachability requires a supported HTTP consumer feeding camel-bean and a bean with multiple methods; affected lines are 3.10.0 through 3.22.3, 4.8.0 through 4.8.4, and 4.10.0 through 4.10.1.

CVSS severity6.3
Medium
EPSS probability81.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Header injection in affected Apache Camel releases allows remote attackers to invoke unintended bean methods through crafted HTTP headers. DefaultHeaderFilterStrategy compares only exact Camel, camel, and org.apache.camel. prefixes, allowing mixed-case internal header names to enter the exchange. Reachability requires a supported HTTP consumer feeding camel-bean and a bean with multiple methods; affected lines are 3.10.0 through 3.22.3, 4.8.0 through 4.8.4, and 4.10.0 through 4.10.1.

The record

CVE
CVE-2025-27636
Published
Mar 9, 2025
Updated
Feb 26, 2026
Vendor
The Apache Software Foundation
Product
Apache Camel
Classifications
CWE-178, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.10.0 <3.22.4
  2. Affected versionversion=4.10.0 <4.10.2
  3. Affected versionversion=4.8.0 <4.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Camelversion=3.10.0 <3.22.4; version=4.10.0 <4.10.2; version=4.8.0 <4.8.5

Published CVSS scores

6.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

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 exploitPublished

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo