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CVE-2026-78164

Status: Awaiting AnalysisHigh (8.2)—PoC
Severity8.2High · CVSS 3.1
Exploitation probability0.45 %higher than 38% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableProof of concept on GitHub (unverified)

Improper Neutralization of Special Elements Used in a Template Engine and Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Camel HTTP, Netty HTTP, Undertow and Vert.x HTTP components.

This issue affects Apache Camel: from 4.0.0 before 4.18.5, from 4.19.0 before 4.22.1.

The Camel HTTP producer families let an inbound message override the endpoint URI through the CamelHttpUri and CamelRestHttpUri headers, and then passed that message-supplied string through CamelContext.resolvePropertyPlaceholders() before using it.

Read full descriptionShow less

Property-placeholder resolution is a configuration-resolution facility, not a URI-parsing step: it reaches operating-system environment variables, JVM system properties, every PropertiesFunction registered on the classpath - including the secret functions - and, through camel-bean, the invocation of a no-argument method on any bean in the registry. Applying it to Exchange content therefore turned a URI string into a configuration- and bean-evaluation context. A route author opted into none of this: a plain static to("http://backend/api") was sufficient. Seven call sites were affected: HttpHelper.createURL and HttpHelper.createMethod in camel-http-common, HttpMethodHelper.createMethod in camel-http, VertxHttpHelper.resolveHttpURI in camel-vertx-http, UndertowHelper.createURL and UndertowHelper.createMethod in camel-undertow, and NettyHttpHelper.createURL in camel-netty-http. The bridgeEndpoint option did not bound the exposure: it suppresses the CamelHttpUri override in the createURL family but not in the createMethod family, so a route using the documented bridging configuration still resolved placeholders taken from the header, and CamelRestHttpUri was consumed before any bridgeEndpoint check in all four components. Only camel-http offered an opt-out, skipControlHeaders, which defaults to false. Reaching the headers did not always require header injection, because several Camel HTTP consumers populate CamelHttpUri from the request line themselves as a documented reverse-proxy feature. An unresolvable placeholder additionally produced a RuntimeExchangeException whose message echoed the URI, which distinguishes a set from an unset configuration key even where no outbound request is made. The behaviour predates the 4.x line. This advisory continues the alignment CAMEL-24282 applied to the toD and enrich dynamic-URI EIPs in 4.22.0, extending the same build-time-resolution contract to the HTTP producer components.

Users should upgrade to version 4.23.0, which fixes the issue. Users on the 4.22.x releases stream should upgrade to 4.22.1. Users on the 4.18.x releases stream should upgrade to 4.18.5. The 4.14.x releases stream and earlier reached end of life before this issue was resolved and will not receive a fix, so deployments on those lines must move to a supported release. For deployments that cannot upgrade immediately, strip the override headers at the trust boundary before the producer with removeHeader("CamelHttpUri") and removeHeader("CamelRestHttpUri"), or set skipControlHeaders=true on camel-http endpoints, which is the only component offering that option. Note that bridgeEndpoint=true is not a workaround: it suppresses the header override when the outbound URL is built but not when the header is re-parsed for the query string. Percent-encoding the placeholder delimiters is likewise not a mitigation for camel-netty-http, whose binding decodes the request path before the value reaches the header, so proxy or WAF rules written against the raw delimiters do not help there. As defence in depth, ensure consumers exposed to untrusted senders apply a strict inbound HeaderFilterStrategy over the Camel namespace, and resolve secrets through a vault rather than through environment variables or system properties that a placeholder can name.

CVSS

Base score
8.2
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.45 %
Percentile among all scored CVEs
38
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

CVSS AV:N/PR:N/UI:N y C:H; el texto indica que una cabecera CamelHttpUri lleva a resolver placeholders que leen variables de entorno, propiedades JVM y secretos de proveedores cloud.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Privileged Account ManagementLimit Access to Resource Over NetworkFilter Network TrafficAuditUpdate SoftwareActive Directory Configuration

Affected technologies (5)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Apache — CamelAIApache — Camel-httpAIApache — Camel-netty-httpAIApache — Camel-undertowAIApache — Camel-vertx-httpAI

CWEs

References

Show 6 references

Raw JSON (NVD)

Show
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      "value": "Improper Neutralization of Special Elements Used in a Template Engine and Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Camel HTTP, Netty HTTP, Undertow and Vert.x HTTP components.\n\n\n\nThis issue affects Apache Camel: from 4.0.0 before 4.18.5, from 4.19.0 before 4.22.1.\n\n\n\nThe Camel HTTP producer families let an inbound message override the endpoint URI through the CamelHttpUri and CamelRestHttpUri headers, and then passed that message-supplied string through CamelContext.resolvePropertyPlaceholders() before using it. Property-placeholder resolution is a configuration-resolution facility, not a URI-parsing step: it reaches operating-system environment variables, JVM system properties, every PropertiesFunction registered on the classpath - including the secret functions - and, through camel-bean, the invocation of a no-argument method on any bean in the registry. Applying it to Exchange content therefore turned a URI string into a configuration- and bean-evaluation context. A route author opted into none of this: a plain static to(\"http://backend/api\") was sufficient. Seven call sites were affected: HttpHelper.createURL and HttpHelper.createMethod in camel-http-common, HttpMethodHelper.createMethod in camel-http, VertxHttpHelper.resolveHttpURI in camel-vertx-http, UndertowHelper.createURL and UndertowHelper.createMethod in camel-undertow, and NettyHttpHelper.createURL in camel-netty-http. The bridgeEndpoint option did not bound the exposure: it suppresses the CamelHttpUri override in the createURL family but not in the createMethod family, so a route using the documented bridging configuration still resolved placeholders taken from the header, and CamelRestHttpUri was consumed before any bridgeEndpoint check in all four components. Only camel-http offered an opt-out, skipControlHeaders, which defaults to false. Reaching the headers did not always require header injection, because several Camel HTTP consumers populate CamelHttpUri from the request line themselves as a documented reverse-proxy feature. An unresolvable placeholder additionally produced a RuntimeExchangeException whose message echoed the URI, which distinguishes a set from an unset configuration key even where no outbound request is made. The behaviour predates the 4.x line. This advisory continues the alignment CAMEL-24282 applied to the toD and enrich dynamic-URI EIPs in 4.22.0, extending the same build-time-resolution contract to the HTTP producer components.\n\n\n\nUsers should upgrade to version 4.23.0, which fixes the issue. Users on the 4.22.x releases stream should upgrade to 4.22.1. Users on the 4.18.x releases stream should upgrade to 4.18.5. The 4.14.x releases stream and earlier reached end of life before this issue was resolved and will not receive a fix, so deployments on those lines must move to a supported release. For deployments that cannot upgrade immediately, strip the override headers at the trust boundary before the producer with removeHeader(\"CamelHttpUri\") and removeHeader(\"CamelRestHttpUri\"), or set skipControlHeaders=true on camel-http endpoints, which is the only component offering that option. Note that bridgeEndpoint=true is not a workaround: it suppresses the header override when the outbound URL is built but not when the header is re-parsed for the query string. Percent-encoding the placeholder delimiters is likewise not a mitigation for camel-netty-http, whose binding decodes the request path before the value reaches the header, so proxy or WAF rules written against the raw delimiters do not help there. As defence in depth, ensure consumers exposed to untrusted senders apply a strict inbound HeaderFilterStrategy over the Camel namespace, and resolve secrets through a vault rather than through environment variables or system properties that a placeholder can name."
    }
  ],
  "lastModified": "2026-10-19T20:45:51.597",
  "sourceIdentifier": "security@apache.org"
}