CVE-2026-85254Network attack vectorHinoki check available

Header reflection via case-sensitive echo suppression

Published Oct 19, 2026 · Updated Oct 19, 2026

Header reflection in Apache Camel Platform HTTP allows remote attackers to echo request headers into responses via altered header casing. PlatformHttpEndpoint.enhanceHeaderFilterStrategyToSkipHttpRequestHeaders uses a case-sensitive set lookup against canonical header names, so lowercase HTTP/2 names always escape suppression. Exploitation requires a reachable affected route; reflected content provides a basis for response-splitting and cache-poisoning attacks whose downstream effects depend on intermediaries.

CVSS severity6.5
Medium
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Header reflection in Apache Camel Platform HTTP allows remote attackers to echo request headers into responses via altered header casing. PlatformHttpEndpoint.enhanceHeaderFilterStrategyToSkipHttpRequestHeaders uses a case-sensitive set lookup against canonical header names, so lowercase HTTP/2 names always escape suppression. Exploitation requires a reachable affected route; reflected content provides a basis for response-splitting and cache-poisoning attacks whose downstream effects depend on intermediaries.

The record

CVE
CVE-2026-85254
Published
Oct 19, 2026
Updated
Oct 19, 2026
Vendor
Apache Software Foundation
Product
Apache Camel
Classifications
CWE-178
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 19, 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 <4.18.5
  2. Affected versionversion=4.19.0 <4.22.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apache Software Foundation · Apache Camelversion=4.0.0 <4.18.5; version=4.19.0 <4.22.1

Published CVSS scores

6.5Apache Software FoundationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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