Header injection vulnerability in Apache Camel



| Updated: 2025-04-11
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-27636
CWE-ID CWE-644
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Apache Camel
Server applications / Frameworks for developing and running applications

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Neutralization of HTTP Headers for Scripting Syntax

EUVDB-ID: #VU105455

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/U:Green]

CVE-ID: CVE-2025-27636

CWE-ID: CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper input validation when processing HTTP requests, as filters are configured to only block headers starting with "Camel", "camel", or "org.apache.camel". A remote non-authenticated attacker can send a specially crafted HTTP request with altered casing of letters in headers that will be accepted by the application.

Successful exploitation of the vulnerability may allow an attacker to perform cross-site scripting, cache poisoning or session hijacking attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Camel: 3.22.0 - 4.10.1

CPE2.3 External links

https://www.openwall.com/lists/oss-security/2025/03/09/1
https://issues.apache.org/jira/browse/CAMEL-21828
https://lists.apache.org/thread/l3zcg3vts88bmc7w8172wkgw610y693z


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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