RHSA-2026:23808
Vulnerability from csaf_redhat - Published: 2026-06-10 12:05 - Updated: 2026-06-10 21:22Summary
Red Hat Security Advisory: Red Hat build of Quarkus 3.27.4 release and security update
Severity
Important
Notes
Topic: An update is now available for Red Hat build of Quarkus.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability. For more information, see the CVE links in the References section.
Details: This release of Red Hat build of Quarkus 3.27.4 includes the following CVE fixes:
* netty-codec-dns: Netty: High integrity impact due to improper DNS domain name constraint enforcement [quarkus-3.27] (CVE-2026-42579)
* netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion [quarkus-3.27] (CVE-2026-42584)
* netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers [quarkus-3.27] (CVE-2026-42581)
* netty-handler-proxy: Netty: HTTP Header Injection via HttpProxyHandler Disabled Validation [quarkus-3.27] (CVE-2026-42578)
* netty-codec-http: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression [quarkus-3.27] (CVE-2026-42587)
* netty-codec-http2: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression [quarkus-3.27] (CVE-2026-42587)
For more information, see the release notes page listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Netty. The HttpProxyHandler component, which handles HTTP CONNECT requests, does not properly validate user-provided outbound headers. This allows an attacker to inject arbitrary HTTP headers into the CONNECT request sent to the proxy server. This could lead to unexpected behavior or potential bypass of security controls on the proxy server.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat build of Quarkus 3.27.4
Red Hat / Red Hat build of Quarkus
|
cpe:/a:redhat:quarkus:3.27::el8
|
— |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in Netty. Netty's DNS (Domain Name System) codec does not properly enforce domain name constraints as defined in RFC 1035 during both encoding and decoding processes. This vulnerability allows a remote attacker to exploit the decoder using malicious DNS responses or exploit the encoder through user-influenced hostnames, leading to a high integrity impact on the affected system.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat build of Quarkus 3.27.4
Red Hat / Red Hat build of Quarkus
|
cpe:/a:redhat:quarkus:3.27::el8
|
— |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in Netty's HttpObjectDecoder. A remote attacker can exploit this by sending a specially crafted HTTP/1.0 request that includes both `Transfer-Encoding: chunked` and `Content-Length` headers. While Netty correctly strips the conflicting `Content-Length` header for HTTP/1.1 messages, this guard is absent for HTTP/1.0. This can lead to HTTP request smuggling, where downstream proxies or handlers may misinterpret message boundaries, potentially allowing an attacker to bypass security controls or access unauthorized information.
7.2 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat build of Quarkus 3.27.4
Red Hat / Red Hat build of Quarkus
|
cpe:/a:redhat:quarkus:3.27::el8
|
— |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit this vulnerability by sending a specific sequence of HTTP responses (103, followed by a 200 with a GET body, then another 200 for a HEAD request) when the client pipelines GET then HEAD requests. This can cause the HttpClientCodec to incorrectly pair responses, leading to subsequent HTTP responses being parsed from the wrong offset. This issue may result in information disclosure or other data integrity problems due to misinterpretation of network traffic.
7.3 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat build of Quarkus 3.27.4
Red Hat / Red Hat build of Quarkus
|
cpe:/a:redhat:quarkus:3.27::el8
|
— |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in Netty. A remote attacker can bypass the configured decompression limit in the HttpContentDecompressor by sending a specially crafted compressed payload using Brotli (br), Zstandard (zstd), or Snappy content encodings. This can lead to unbounded memory allocation, resulting in an out-of-memory Denial of Service (DoS) for the affected system.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat build of Quarkus 3.27.4
Red Hat / Red Hat build of Quarkus
|
cpe:/a:redhat:quarkus:3.27::el8
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
62 references
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"cwe": {
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"ids": [
{
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"notes": [
{
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"text": "A flaw was found in Netty\u0027s HttpObjectDecoder. A remote attacker can exploit this by sending a specially crafted HTTP/1.0 request that includes both `Transfer-Encoding: chunked` and `Content-Length` headers. While Netty correctly strips the conflicting `Content-Length` header for HTTP/1.1 messages, this guard is absent for HTTP/1.0. This can lead to HTTP request smuggling, where downstream proxies or handlers may misinterpret message boundaries, potentially allowing an attacker to bypass security controls or access unauthorized information.",
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},
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"title": "Statement"
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{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat build of Quarkus 3.27.4"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-42581"
},
{
"category": "external",
"summary": "RHBZ#2477232",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477232"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-42581",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42581"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-42581",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42581"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-xxqh-mfjm-7mv9",
"url": "https://github.com/netty/netty/security/advisories/GHSA-xxqh-mfjm-7mv9"
}
],
"release_date": "2026-05-13T17:54:44.492000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T12:05:35+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat build of Quarkus 3.27.4"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:23808"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"products": [
"Red Hat build of Quarkus 3.27.4"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "netty: io.netty/netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers"
},
{
"cve": "CVE-2026-42584",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-05-13T19:01:51.846351+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477224"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit this vulnerability by sending a specific sequence of HTTP responses (103, followed by a 200 with a GET body, then another 200 for a HEAD request) when the client pipelines GET then HEAD requests. This can cause the HttpClientCodec to incorrectly pair responses, leading to subsequent HTTP responses being parsed from the wrong offset. This issue may result in information disclosure or other data integrity problems due to misinterpretation of network traffic.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "netty: io.netty/netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Important: A flaw in Netty\u0027s HttpClientCodec allows a remote attacker to cause data confusion. By sending a specially crafted sequence of HTTP responses, an attacker can cause subsequent HTTP responses to be parsed incorrectly, potentially leading to information disclosure or data integrity issues in applications utilizing Netty for HTTP client operations. This vulnerability affects various Red Hat products that bundle Netty, including Red Hat AMQ, Enterprise Application Platform, Red Hat Build of Quarkus, and Red Hat Build of Keycloak.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat build of Quarkus 3.27.4"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-42584"
},
{
"category": "external",
"summary": "RHBZ#2477224",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477224"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-42584",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42584"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-42584",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42584"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3",
"url": "https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3"
}
],
"release_date": "2026-05-13T18:10:48.437000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T12:05:35+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat build of Quarkus 3.27.4"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:23808"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"products": [
"Red Hat build of Quarkus 3.27.4"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "netty: io.netty/netty-codec-http: Netty: Incorrect HTTP response parsing leads to data confusion"
},
{
"cve": "CVE-2026-42587",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-05-13T19:01:35.415881+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477220"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Netty. A remote attacker can bypass the configured decompression limit in the HttpContentDecompressor by sending a specially crafted compressed payload using Brotli (br), Zstandard (zstd), or Snappy content encodings. This can lead to unbounded memory allocation, resulting in an out-of-memory Denial of Service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "netty: io.netty/netty-codec-http: io.netty/netty-codec-http2: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in Netty\u0027s HTTP content decompression. A remote attacker can exploit this flaw by sending specially crafted compressed payloads using Brotli, Zstandard, or Snappy encodings, bypassing configured decompression limits. This leads to unbounded memory allocation, potentially causing an out-of-memory condition and rendering affected Red Hat systems unavailable.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat build of Quarkus 3.27.4"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-42587"
},
{
"category": "external",
"summary": "RHBZ#2477220",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477220"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-42587",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42587"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-42587",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42587"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-f6hv-jmp6-3vwv",
"url": "https://github.com/netty/netty/security/advisories/GHSA-f6hv-jmp6-3vwv"
}
],
"release_date": "2026-05-13T18:22:21.699000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-10T12:05:35+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat build of Quarkus 3.27.4"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:23808"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat build of Quarkus 3.27.4"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat build of Quarkus 3.27.4"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "netty: io.netty/netty-codec-http: io.netty/netty-codec-http2: Netty: Denial of Service via unbounded memory allocation in HTTP content decompression"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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