CVE-2026-85296Network attack vectorHinoki check available

Cross-partner signing confusion via shared request state

Published Oct 19, 2026 · Updated Oct 19, 2026

Signing-key confusion in Apache Camel AS2 allows remote attackers to receive receipts signed with another trading partner's key. ResponseMDN.process() overwrites shared instance fields with request-specific signing material and retains it across requests. Multi-partner deployments using dynamic keys reach this condition during ordinary traffic, undermining receipt attribution without establishing private-key extraction.

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

Signing-key confusion in Apache Camel AS2 allows remote attackers to receive receipts signed with another trading partner's key. ResponseMDN.process() overwrites shared instance fields with request-specific signing material and retains it across requests. Multi-partner deployments using dynamic keys reach this condition during ordinary traffic, undermining receipt attribution without establishing private-key extraction.

The record

CVE
CVE-2026-85296
Published
Oct 19, 2026
Updated
Oct 19, 2026
Vendor
Apache Software Foundation
Product
Apache Camel
Classifications
CWE-488
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:H/PR:N/UI:N/S:U/C:H/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-488Exposure of Data Element to Wrong Session

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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