CVE-2026-71300Network attack vector

Message redirection via unfiltered WebSocket dispatch headers

Published Aug 24, 2026 · Updated Aug 24, 2026

Header injection in Apache Camel 4.0.0 before 4.14.9, 4.15.0 before 4.18.4, and 4.19.0 before 4.22.0 allows remote attackers to redirect messages. The Atmosphere WebSocket producer trusts unfiltered websocket.connectionKey.list Exchange headers from bridged HTTP consumers and evaluates that list before the route-selected recipient. A route must bridge untrusted HTTP input to the header-driven producer; a crafted inbound header can replace or suppress delivery when the sender knows a target connection key.

CVSS severityUnavailable
Unscored
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Header injection in Apache Camel 4.0.0 before 4.14.9, 4.15.0 before 4.18.4, and 4.19.0 before 4.22.0 allows remote attackers to redirect messages. The Atmosphere WebSocket producer trusts unfiltered websocket.connectionKey.list Exchange headers from bridged HTTP consumers and evaluates that list before the route-selected recipient. A route must bridge untrusted HTTP input to the header-driven producer; a crafted inbound header can replace or suppress delivery when the sender knows a target connection key.

The record

CVE
CVE-2026-71300
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
The Apache Software Foundation
Product
Apache Camel
Classifications
CWE-20, T1565.002
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 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=4.0.0 <4.14.9
  2. Affected versionversion=4.15.0 <4.18.4
  3. Affected versionversion=4.19.0 <4.22.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Apache Software Foundation · Apache Camelversion=4.0.0 <4.14.9; version=4.15.0 <4.18.4; version=4.19.0 <4.22.0

Published CVSS scores

No CVSS assessment is available in this record.

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1565.002Transmitted Data Manipulation

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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