Unauthenticated stack-trace disclosure via unmuted route errors
Published Jul 6, 2026 · Updated Jul 6, 2026
Information disclosure in affected Apache Camel Undertow releases allows remote attackers to read Java stack traces via route errors. The HTTP consumer writes the full Throwable stack trace into a text/plain response when muteException is false, while RestUndertowHttpBinding hard-codes false for Rest DSL. Reachability requires an exposed consumer and a request that triggers route processing failure; affected lines are 4.0.0 through 4.14.7, 4.15.0 through 4.18.2, and 4.19.0 through 4.20.0.
Summary
What happened
Information disclosure in affected Apache Camel Undertow releases allows remote attackers to read Java stack traces via route errors. The HTTP consumer writes the full Throwable stack trace into a text/plain response when muteException is false, while RestUndertowHttpBinding hard-codes false for Rest DSL. Reachability requires an exposed consumer and a request that triggers route processing failure; affected lines are 4.0.0 through 4.14.7, 4.15.0 through 4.18.2, and 4.19.0 through 4.20.0.
The record
- CVE
- CVE-2026-56139
- Published
- Jul 6, 2026
- Updated
- Jul 6, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache Camel Undertow
- Classifications
- CWE-209, T1595.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 6, 2026CVE publishedPublication date reported by the CVE source.
- Jul 6, 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.
- Affected versionversion=4.0.0 <4.14.8
- Affected versionversion=4.15.0 <4.18.3
- Affected versionversion=4.19.0 <4.21.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- CVE-2026-56139 Apache Camel camel-undertow Rest DSL reproducerproof of concept · demonstrated
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
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